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Science

ResourcesQuestionsScience

Aqa Specimen Paper's

how do I find the grade boundaries for aqa specimen paper's for gcse?

Emma

Are nerve impulses and electrical pulses the same thing?

Are nerve impulses and electrical pulses the same thing?

Emma

Can anybody help?

How the structure of capillaries is designed for efficient exchange of materials between the blood and the cells of the tissues

Emma

Can I become a GCSE science tutor, if I'm 17?

I did really well in seperate sciences GCSE with an A* in biology, chemistry and physics, I was wondering if there were any companies that offered 17 year olds to be able to tutor GCSE students, I know there;s some, I just can't remember the names?

Emma

can you name two solids that dissolve in water?

can you name two solids that dissolve in water?

Emma

Can you see the sun from earth?

Can you see the sun from earth?

Emma

Careers using geology

Interested to geoscience

Emma

cells

Explain why golgi structures are very noticeable in cells lining the stomach and intestine?

Emma

Confused on this question can anyone help?

Explain electrical activity within the heart that co-ordinates the cardiac cycle

Emma

definition of energy and electricity?

definition of energy and electricity?

Emma

describe the reaction that take place in blast furnace?

that all i want to know help me please :)

Emma

do cats see in black and white or i color

do cats see in black and white or i color

Emma

Doing IGCSE Chemistry exam tomorrow, what do i need to know for paper 1?

1 day left, need to cram some revision ahhhhh

Emma

Equation for copper nitrate

What are the names of the oxide and acid you use to create copper nitrate?

Emma

GCSE EQUIVALENCY TEST

Hi I have to sit a GCSE EQUIVALENCY TEST for science at Canterbury Christ Church - does anyone have any advice or know what the paper entails?

Emma

genetics

Male chickens carry two Z sex chromosomes, while female chickens carry one Z sex chromosome and one W sex chromosome. Located on the Z chromosome is a gene for barring. Barred feathers have black and white stripes. The barred trait is dominant to the unbarred trait. Chickens have a fleshy growth on top of the head called a comb. An autosomal trait called rose comb is dominant to a trait called single comb. An unbarred male heterozygous for the rose-comb trait is crossed with a barred female with a single comb. What proportion of the resulting progeny are expected to be barred males with single combs? Give your answer as a fraction or as a decimal to the nearest hundredth.

Emma

gense

The con and pro of cloning?

Emma

Goblet cells in trachea

why is the number of mitochondria high in goblet cells?

Emma

How does a guitar (acoustic) make its sound louder?

How does a guitar (acoustic) make its sound louder?

Emma

How does gravity work?

im stuck on my science progect can you help me i was not paying attention in class you have got to help me

Emma

how does scrap heap magnet work?

how does a scrap heap magnet work?

Emma

Insects and food

why do some insects spoil food?

Emma

neutralisation reactions

i need to do an essay on neutralisation reactions and the use in the real world and one of the questions is.... "use detailed science to explain to use of neutralisation reactions." i need help!!!

Emma

Particle Size

What has a bigger particle size Paraffin Wax or Stearic acid?

Emma

rivers and glaciers can fragments of rock

rivers and glaciers can fragments of rock

Emma

ways to reduce heat loss from a house

ways to reduce heat loss from a house

Emma

What animals are mischievous?

I need to know this soon because I need to do it today so I can pass it tomoz so any animal you can think of that is mischievous please just say because it would help alot! ;)

Emma

what are animals that eat other aniamls called

what are animals that eat other aniamls called

Emma

what are the properties of sedimentary,igneous and metamorphic rock

Its around geology

Emma

what are the variables in science?

what are the variables in science?

Emma

What does observation mean?

What does observation mean?

Emma

what does the habitat provide for an animal or plant

what does the habitat provide for an animal or plant

Emma

What F is used to measure force?

This is all about Balancing act. And I need to know it for my homework so if you know the answer can you just help please thank you.........:)........... And one more question..... What W is the amount of forces with which gravity is pulling down something?................And once more thank you!!!!!!!!!!!!!1111......:D

Emma

what feature of the car is designed to reduce friction?

I just need to know a the feature for my science essay on friction.

Emma

What Gametes are?

Biology course work help please

Emma

what is 100 grams in kcal

food homework

Emma

what is a food type or brand

food

Emma

what is a PH scale?

what is a PH scale?

Emma

what is a PH scale?

what is a PH scale?

Emma

what is a rock

what is a rock

Emma

What is a rock cycle?

A picture?

Emma

what is a soulte

what is a soulte

Emma

what is an axon terminal?

what is an axon terminal?

Emma

what is gda

food homework

Emma

what is kinetic energy?

what is kinetic energy?

Emma

what is the feamale part of a flower

what is the feamale part of a flower

Emma

What is the order of the planets?

What is the order of the planets?

Emma

what is the thing called that tells you the ph of something

what is the thing called that tells you the ph of something

Emma

which and how do animals use sound?

which and how do animals use sound?

Emma

which bones protect the spinal column

which bones protect the spinal column

Emma

Who discovered electricity?

Who discovered electricity?

Emma

why are yellow red and black stripes good warning sign for preditors

why are yellow red and black stripes good warning sign for preditors

Emma

Explain why muscle cells are associated with a large number of mitochondria


Mitochondria in Muscle Cells

Mitochondria are the power house of the cells. They produce the energy that muscles cells need to function. Put simply, mitochondria are cell organelles linked to the membrane which work to generate enough chemical energy necessary to fuel the biochemical reactions of the cell. The chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate. Mitochondria release energy through aerobic respiration. As you may know energy (ATP) is a basic requirement for muscle function such as contraction and relaxation Mitochondria are the part of the cell that produces ATP which the cell can then use as energy to do work. Muscle cells require a lot of ATP to carry out contraction and this is why a large number of mitochondria are required to produce this ATP.

How do Mitochondria make energy?

Muscle cells contain actin and myosin filaments, which move in such a way that enables the muscle to contract. This process uses chemical energy, derived from ATP being broken down into ADP and phosphate. The cell needs lots of ATP. And mitochondria (the powerhouse of the cell) function to respire carbohydrates to produce ATP.

Emma

How does a scrap heap magnet work?


How does a scrap heap magnet work?

A Scrap Heat Magnet is a magnet that is used to transport metal scrap in a junkyard. It can only lift things that are magnetic. The scrap heap magnet is basically a giant electromagnet that is powered by a very large battery. It works the same way an ordinary electromagnet works. Thick insulated copper wire is wound around a soft iron core. The magnetic power of an electromagnet depends upon the current and the number of turns in the coil. The copper wire can withstand very strong currents and a large number of turns in the coil create a very strong magnetic field. When the current passes it becomes very strong and attracts all the magnetic materials in the scrap.

Emma

which gases in the air cause acid rain

which gases in the air cause acid rain

Emma

What does reproduction mean?

What does reproduction mean?

Emma

what is the reaction between copper carbonate and sulphuric acid?

The reaction between copper carbonate and sulphuric acid will be a neutralization reaction. Copper carbonate will acts as a base, however, sulphuric acid is an acid. This reaction can also be viewed as a double displacement reaction too. Let's understand the nature of this reaction and what will be the final product of this reaction. Reaction of copper carbonate with sulphuric acid

Neutralization Reaction

The word neutralization means that the PH of the product will be around . Sometimes it can be fix , sometimes it is around . We consider from to as neutrals. PH stands for Potential of Hydrogen. Hydrogen is an acidic element and if it is combined with any element or compound, it will result in an acidic compound. The PH scale measures the power of hydrogen in a compound.

Understanding PH Scale

Ph scale showing the acidic, neutral, and alkaline region The above picture represents the pH scale starting from 1 and ending on 14. There are three regions in the pH scale. From pH 1 to pH 6, it is the acidic region where 1 being the most acidic region and 6 being the weakest acidic region. From pH 8 to pH 14, it is the alkaline region where 8 being the weakest alkaline and 14 being the most alkaline region. Their color represents their value. The basic test for acid and alkaline is through litmus paper. It is a special type of paper that responds to acidic or basic mediums. Litmus paper comes in two colors, red and blue. If the blue litmus paper turns red, that means your substance is acidic and if remains blue, you are in an alkaline medium. In the case of red litmus paper, if it turns blue that means the medium is acidic, however, if it remains blue that indicates the medium is alkaline.

Neutralization Reaction Results

Neutralization reaction occurs when one compound is acidic and another compound is basic. If both compounds are acidic, there will be no reaction. The same goes for both basic compounds reacting to each other. Neutralization reaction usually results in salt and water, we will explain why water is emitted from neutralization reaction. However, if you check closely, copper is in carbonate form. This means copper has carbon dioxide with it. Whenever carbonates react with acid, they will also release carbon dioxide with water and salt.

Observation of Copper Carbonate and Sulphuric Acid Reaction

Copper Carbonate

Copper carbonate is a compound that contains a transition element (which is copper) and a carbonate compound. Since copper is a transition element, it will show you color, which is why the color of the solid is green. The molar mass of this compound is and is insoluble in water. The ion of copper is and the ion of carbonate is . They both go under an ionic reaction and that will result in copper carbonate . Because of the carbonate properties, copper carbonate is . It means it is an alkaline compound.

Sulphuric Acid

Sulphuric acid is also a compound that contains hydrogen, sulfur, and oxygen elements. Sulphuric acid is known as the king of acids because of its highly acidic property. It is a very strong acid having pH of . It is usually in aqueous form and is a colorless solution. The molar mass of this compound is . Sulphuric acid is made industrially where sulfur and oxygen go under various steps to form sulphuric acid. The name of this process is Contact Process. 

Observations

Acid-base reactions are highly exothermic. It means these reactions will release energy in terms of heat. However, the amount of energy-releasing varies from reaction to reaction. One thing is for sure, you will observe a colorless gas been emitted. That gas is carbon dioxide. The reaction kinetics in an account then increasing the temperature and increasing the sulphuric acid concentration will enhance the rate of reaction. If this reaction is done at RTP conditions, it will take 10 - 20 seconds for a complete neutralization reaction. Once the reaction is finished, the resultant product color will be blue.

Copper Carbonate and Sulphuric Acid Balanced Equation

Here is the moment you all have been waiting for, if copper carbonate reacts with sulphuric acid, it will result in copper(II) sulfate, water, and carbon dioxide. Below is the reaction: Reaction of copper carbonate with sulphuric acid with its final product, cupper 2 sulfate, water, and carbon dioxide There is no need to balance the equation because it is already balanced. Let's break this equation and check its ionic equation: Breaking the reaction of copper carbonate with sulphuric acid in its ions All the compounds are broken in their ions. In the above equation, is a spectator ion. Spectator ions don't involve in the ionic reaction. Now we will cut off the spectator ion that is common on both sides of the equation and add their state. Ionic equation of solid copper carbonate reacting with sulphuric acid The above ions are taking part in the reaction. You can check out that water and carbon dioxide are being produced. If you check all ionic equations of acid-base reactions, you will find that water is always produced. In the case of carbonates, carbon dioxide and water are produced.

Double Displacement Reaction

Any reaction that exchanges anions or cations are known as displacement reaction. There are two types of displacement reactions, single displacement reaction, and double displacement reaction. If two reactants exchanges cations and anions to make new products, that reaction is called a double displacement reaction. On the other hand, if one reactant exchanges cation or anion from the other reactant, we call it a single displacement reaction. Acid-base reactions are always double displacement reactions. and are replaced to form water and the rest ions react with each other to form salt. Replacement occurs on the basis of reactivity series and that is a different domain, let's stick to acid-base for now.

Reaction Between Hydrochloric Acid and Copper Carbonate

At this point, you might be thinking what happens if we react hydrochloric acid with copper carbonate? Let's get to the result, the equation will be something like this:

Half reaction equation of copper carbonate with hydrochloric acid

As the name tells you hydrochloric acid is another type of acid. If we compare hydrochloric acid with sulphuric acid then hydrochloric acid is weaker than sulphuric acid. Its pH value is but it is considered a strong acid. The power of acids is determined by their dissociation in water and hydrochloric acid dissociates completely in water. Of course, changing of acid will result in a new equation but there are some things that will remain common, and guess what they are? If you guessed carbon dioxide and water then you are 100% correct! If acid reacts with a base, it will always release water, but if the base is carbonate, it will release carbon dioxide and water. The only change we will see is in salt. Reaction of copper carbonate with hydrochloric acid The salt produced in this reaction is copper II chloride. The reaction requires 2 moles of hydrochloric acid to completely react with 1 mole of copper carbonate. The color of copper chloride is blue-green and yes, this reaction is a double displacement reaction. Let's check its ionic equation:

Breaking of copper carbonate reaction with hydrochloric acid into its ions

Now we will cut off all the spectator ions. In the above ionic equation, the spectator ion is , after cutting off chlorine, this will be the final ionic equation with their states: Ionic equation of solid copper carbonate reacting with hydrochloric acid

Does Sulphuric Acid React with Copper?

There are two stories on this topic. Usually, we use diluted solutions of acids and bases for reaction. You must be thinking why? This is to lower the amount of concentration of both, acid and alkali. This also results in decrease in pH values because and are involved with water molecule. This is necessary for laboratory experiments because concentrated bases and acids are very dangerous to handle. A small mistake can result in a big disaster! Furthermore, diluting these chemicals does lower the concentration of and   ions but it is good for you because it will be easier to reach the pH than using concentrated solutions. In addition, a tremendous amount of energy will be released in the reaction of concentrated acids and bases that can trigger many alarms in a laboratory. The first rule of performing an experiment is to be safe, don't forget, safety is first! If you add copper metal to diluted sulphuric acid, there will be no reaction. Here is the reason, remember about the displacement reaction? Displacement reaction occurs on the reactivity series. The reactivity series is a series of elements that are listed according to their reactivity. The top on the list is the most reactive and the bottom on the list is the least reactive. If you check the reactivity series, copper is below hydrogen which shows copper is less reactive than hydrogen. Displacement reaction occurs when a most reactive cation replaces the less reactive cation. This condition doesn't fulfill in the above case. However, if you tried to react copper with concentrated sulphuric acid, then there is a possible reaction. The reaction of concentrated sulphuric acid and copper is not an acid-base reaction, it is a redox reaction. Below is the chemical equation of this reaction: Reaction of copper with concentrated sulphuric acid Copper reacts with 2 moles of sulphuric acid (concentrated) to produce copper sulfate, water, and sulfur dioxide. Let's study its redox, concentrated sulphuric acid is a reducing agent. That means is converted to to oxidize copper from to . This reaction requires external heat to reach its activation energy.

Emma

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