1 / 11

04/08/2014

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.

anika
Télécharger la présentation

04/08/2014

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 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

  2. 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)

  3. 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

  4. 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?

  5. How to set up your experimental equipment WARNING To avoid suck back remove the delivery tube from the limewater BEFORE you stop heating

  6. Carry out the experiment

  7. heated 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

  8. Name some sources of proteins and carbohydrates. ProteinsCarbohydrates Egg Potatoes Pasta Meat Bread Fish Rice Nuts Sugar Cheese Beans 11:09 PM

  9. How cooking affects protein molecules

  10. Homework Complete clozed passage on ‘Protein’ sheet.

More Related