Acid + Metal Reactions

Starter: Use a green pen to work through your exercise

book and respond to the comments I have given after you work.

You will need:• 1 piece magnesium ribbon. • 5cm3 HCl• 2 boiling tubes• Boiling tube rack. • Splint• Bunsen burner and mat.

Safety:• Hair tied back. • Ties tucked in. • Stood up, chairs/bags

under bench. • Safety glasses.

Record your observations.

When magnesium ribbon was added to the hydrochloric acid….

When we tested the gas with…

This means that when an acid is reacted with a metal….

Acid + Metal Salt + Hydrogen

Write the equation for the reaction in the experiment.

Questions

pH of solution: Colour of universal indicator: Description:

1 (ii) strong acid(i) green (iv)14 (iii) (v)

1. Complete the following table:

2. The following equation shows the reaction that takes place between an acid and an alkali:a) Name this type of reaction.(1 mark)b) Write a word equation that shows the reaction between nitric acid and potassium hydroxide.(1 mark)c) Write a symbol equation for the same reaction.(1 mark)(Marks available: 3)

3. Complete the following equations:a) calcium carbonate + nitric acid =b) sodium carbonate + sulphuric acid =c) Ethanoic acid + sodium hydroxide = (Marks available: 3)

Salt: Acid: Alkali:Ammonium nitrate

Potassium phosphate

4. Some salts are made in industry for use as fertilizers in farming.Complete the table showing acid and alkali used to make these salts(4 marks)

Answers1. (i) 7/(ii) red/(iii) blue/purple/(iv) neutral/(v) strong alkali2. a) Neutralisation. b) nitric acid + potassium hydroxide → potassium nitrate + water(Mark is gained for writing potassium nitrate as the salt).c) HNO3(aq) + KOH(aq) → KNO3(aq) + H20(aq)

3. a) = calcium nitrate + carbon dioxide + waterb) = sodium sulphate + water + carbon dioxidec) = sodium ethanoate + water

Salt: Acid: Alkali:Ammonium nitrate Nitric acid Ammonium hydroxide

Potassium phosphate Potassium hydroxide Phosphoric acid

Reaction of Metal Carbonates with Acids

Metal Carbonate + Acid Salt + Water + Carbon Dioxide For example,

Calcium Carbonate + Nitric Acid Calcium Nitrate + Water + Carbon Dioxide

Magnesium carbonate + Hydrochloric Acid ________________ + ________ + _______________

Sodium Carbonate + Nitric Acid ___________________ + __________ + _______________

Calcium Carbonate + Sulfuric Acid __________________ + ___________ + _______________

Potassium Carbonate + Hydrochloric Acid _________________ + _________ + _______________

Lithium Carbonate + _____________ Lithium Sulfate + _____________ + __________________

CaCO3 + H2SO4 __________ + H2O + CO2

Na2CO3 + __________ 2NaCl + H2O + CO2

Reaction of Metal Carbonates with Acids Metal Carbonate + Acid Salt + Water + Carbon Dioxide For example, Calcium Carbonate + Nitric Acid Calcium Nitrate + Water + Carbon Dioxide 1. Magnesium carbonate + Hydrochloric Acid ________________ + ________ + _______________ 2. Sodium Carbonate + Nitric Acid ___________________ + __________ + _______________ 3. Calcium Carbonate + Sulfuric Acid __________________ + ___________ + _______________ 4. Potassium Carbonate + Hydrochloric Acid _________________ + _________ + _______________ 5. Lithium Carbonate + _____________ Lithium Sulfate + _____________ + __________________ 6. CaCO 3 + H 2 SO 4 __________ + H 2 O + CO 2 7. Na 2 CO 3 + __________ 2NaCl + H 2 O + CO

• http://www.ocr.org.uk/Images/69840-test-c1-acids-and-alkalis-specimen.pdf

• Q9 Q16