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04/08/2014. The Effect of Heating Baking powder L.O. I know the gas that is given off when baking powder is heated and can test for that gas safely. I can write the word equation for the decomposition of baking powder. I can describe the effect of heating on proteins. 11:09 PM.

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04/08/2014

  • The Effect of Heating Baking powder

  • L.O.

  • I know the gas that is given off when baking powder is heated and can test for that gas safely.

  • I can write the word equation for the decomposition of baking powder.

  • I can describe the effect of heating on proteins

11:09 PM


Baking powder

The chemical name for baking powder is sodium

hydrogencarbonate. Its formula is NaHCO3.

There are ___ elements in NaHCO3.

List them and the no. of atoms of each.

4

1 sodium atom (Na)

1 hydrogen atom (H)

1 carbon atom (C)

3 oxygen atoms (O)


When sodium hydrogencarbonate is heated it

decomposes. This means it breaks down into

simpler substances. The simpler substances

that form are sodium carbonate, water and

carbon dioxide.

Write the word equation for the reaction

sodium hydrogencarbonate

sodium carbonate + water + carbon dioxide


We can carry out an experiment to prove that carbon dioxide gas is given off.

What liquid do we use to test for carbon dioxide gas?


How to set up your experimental equipment gas is given off.

WARNING

To avoid suck back remove the delivery tube from the limewater BEFORE you stop heating


Carry out the experiment gas is given off.


heated gas is given off.

1. Baking powder gives off a gas when it is ________.

2. This gas helps to make cakes _______.

3. The gas given off when baking powder is heated is called ______________.

4. We can test for the presence of this gas using ________.

5. When the gas is passed through limewater it reacts and turns the limewater _______.

6. ______ is used in baking bread to make it rise.

7. Potatoes and bread are good sources of ____________.

8. What can you add to plain flour to be able to use it to make cakes? ____________________________________

rise

carbon dioxide

limewater

milky

Yeast

carbohydrates

baking powder

11:09 PM


Name some sources of proteins and carbohydrates. gas is given off.

ProteinsCarbohydrates

Egg

Potatoes

Pasta

Meat

Bread

Fish

Rice

Nuts

Sugar

Cheese

Beans

11:09 PM



Homework
Homework gas is given off.

Complete clozed passage on ‘Protein’ sheet.


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