1. QUICK START Why do bath bombs fizz? TITLE: Acids and carbonates DATE:
Monday, 19 November 2018
Why do bath bombs fizz?

2. Check your answer
When baking soda and citric acid are mixed and are then put in water, they undergo a chemical reaction. The reaction produces lots of bubbles, which you see as the bath bomb dissolves in the water. These bubbles that make the water become so fizzy are made of carbon dioxide gas
Added by MGN- please hide if not convenient

3. Reactions of ACID with CARBONATE produce a SALT plus WATER plus CARBON DIOXIDE
Learning Objectives
B to 1 : Can state that acid + carbonate is a neutralisation reaction
2: Can recall Acid + Carbonate --> Salt + Water + Carbon dioxide
3: Can describe the chemical test and outcome for Carbon dioxide
Can generate word equations from given acids and carbonates
5 - 6 Can generate symbol equations from word equations and consider need for balancing equations

4. metal + acid salt + water + carbon
TASK 1 – The reaction
You have just seen the reaction between vinegar and sodium hydrogen carbonate. When metal carbonates react with an acid a gas is produced. This is why we see fizzing.
metal acid salt + water + carbon
carbonate dioxide
The carbon and oxygen in the carbonate become carbon dioxide gas.
This is another type of neutralisation reaction which forms a salt from an acid
Monday, 19 November 2018

5. PROGRESS TARGETS
IDENTIFY what gas is produced when acids react with metal carbonates.
DESCRIBE what you would observe when acids react with carbonates.
EXPLAIN the chemical test for carbon dioxide.
APPLY data from experiments and be able to write some word/symbol equations for these reactions
Monday, 19 November 2018

6. Testing for Carbon Dioxide https://www.youtube.com/watch?v=0J4HpjwKwsg
TASK 2 - Scenario
Testing for Carbon Dioxide
Lime water turns from clear to cloudy with carbon dioxide
Acid
Carbonate

7. Is carbon dioxide present?
Table of results
Metal carbonate name
Observations
Is carbon dioxide present?
Calcium carbonate
e.g. It fizzes
e.g. Yes, limewater goes cloudy
Potassium carbonate
Sodium carbonate
Magnesium carbonate
Copper carbonate
Added by MGN please hide if not convenient
Extension: write word equations for your chemical reactions. If you can, write down symbol equations. Extra challenge: can you balance them?
e.g. calcium carbonate+ hydrochloric acid  calcium chloride+ water+ carbon dioxide
e.g. CaCO3+ HCl  CaCl H2O + CO2

8. TASK 3 - Scenario
A luxury soap manufacturer would like to produce a new, extremely fizzy, bath bomb.
The fizzier it is, the quicker it will dissolve and release its fragrance.
You have been asked to find out which metal carbonate would make the best bath bombs.
You will be provided with different metal carbonates to investigate…
Monday, 19 November 2018

9. YOU HAVE 5 MINUTES TO PLAN HOW YOU WILL CARRY OUT YOUR INVESTIGATION
START
MAKE SURE YOU KNOW WHAT DATA YOU SHOULD RECORD
FINISH
Monday, 19 November 2018

10. TASK 4 – Things to consider
Why do metal carbonates make carbon dioxide ?
This is a symbol equation of the reaction between an acid (hydrochloric acid) and calcium carbonate.
HCl + CaCO CaCl H2O + CO2
Use this symbol equation to write a word equation for this reaction
Can you write a word equations for all of the experiments you did in your investigation ?
Can you write symbol equations for all of the experiments you did in you investigation ?
Monday, 19 November 2018

11. PROGRESS TARGETS
IDENTIFY what gas is produced when acids react with metal carbonates.
DESCRIBE what you would observe when acids react with carbonates.
EXPLAIN the chemical test for carbon dioxide.
APPLY data from experiments and be able to write some word/symbol equations for these reactions
Monday, 19 November 2018