Baking with bubbles L.O.:  Describe reactions of acids with metal carbonates and metal hydrogen carbonates.  Describe sodium hydrogen carbonate as baking.

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Presentation transcript:

Baking with bubbles L.O.:  Describe reactions of acids with metal carbonates and metal hydrogen carbonates.  Describe sodium hydrogen carbonate as baking powder.  The use in the home of carbon dioxide.  How to collect carbon dioxide  A test for carbon dioxide.

Demo

Neutralisation Reactions: carbonates Each carbonate ion provides one oxygen to join with two H+ ions. At the same time carbon dioxide is released. Carbonates: 2H + + CO 3 2-  H 2 O + CO 2 Eg. Potassium +hydrochloric  water + carbon +potassium carbonate aciddioxidechloride CO 3 2HH 2 OCO 2 K 2 CO 3 +2HCl  H 2 O+CO 2 +2KCl Eg. calcium +nitric  water + carbon + calcium carbonate aciddioxide nitrate CO 3 2HH 2 O CaCO 3 +2HNO 3  H 2 O+CO 2 +Ca(NO 3 ) 2

1)Which salt is produced when: a)Sodium carbonate reacts with hydrochloric acid Sodium chloride a)Sodium hydrogen carbonate reacts with sulphuric acid? Sodium sulphate

Ways of collecting carbon dioxide: o Gas syringe o Downward delivery o Over water

Sodium hydrogen carbonate is used as baking powder. The baking powder also contains a dry acid. Moisture in the cake allows for both of them to react releasing carbon dioxide.

A test for carbon dioxide: It turns limewater cloudy white

Uses in the home of carbon dioxide.

Baking with bubbles L.O.:  Describe reactions of acids with metal carbonates and metal hydrogen carbonates.  Describe sodium hydrogen carbonate as baking powder.  The use in the home of carbon dioxide.  How to collect carbon dioxide  A test for carbon dioxide.

Breaking down in the heat L.O.:  Describe the thermal decomposition of carbonates and hydrogen carbonates.

Thermal decomposition of copper carbonate Demo. Draw a sketch of the experiment and write down your observations Copper carbonate → copper oxide + carbon dioxide

Hydrogen carbonates Hydrogen carbonates also break down to release carbon dioxide when heated, but different products are formed. Here are the equations for the thermal decomposition of sodium hydrogen carbonate: sodium hydrogen carbonate → sodium carbonate + carbon dioxide + water 2NaHCO 3 → Na 2 CO 3 + CO 2 + H 2 O

test

Collecting gases

Breaking down in the heat L.O.:  Describe the thermal decomposition of carbonates and hydrogen carbonates.