13. In the preparation of magnesium carbonate, magnesium was burnt in air and the product collected. Dilute sulphuric acid was then added and the mixture filtered and cooled. Sodium carbonate was added to the filtrate and the contents filtered. The residue was then washed and dried to give a white powder.

Question

(a) Give the name of the product
(b) Write the chemical equation for the formation of the product
(c) (i) Name the filtrate collected after sodium carbonate was added.
(ii) Write down the chemical formula of the white powder
(d) Write a chemical equation for the reaction between product in (a) and the acid
(e) Write an ionic equation to show the formation of the white powder.
(f) Write an equation to show what happens when the white powder is strongly heated.
(g) Identify the ions present in the filtrate after addition of sodium carbonate

Answer 1

(a) Magnesium carbonate
(b) Mg + O2 → MgO
MgO + H2SO4 → MgSO4 + H2O
MgSO4 + Na2CO3 → MgCO3 + Na2SO4
(c) (i) Sodium sulphate solution
(ii) MgCO3
(d) MgCO3 + 2HCl → MgCl2 + CO2 + H2O
(e) Mg2+ + CO32- → MgCO3
(f) MgCO3 → MgO + CO2
(g) Na+ and SO42- ions.

Answer 2

Use the sentence to answer the question.

When Stefan gets tired he likes to take a nap on the couch.

Which revision of this sentence uses commas accurately

Answer 3

When Stefan gets tired, he likes to take a nap on the couch.

Answer 4

(a) Magnesium carbonate
(b) Mg + O2 → MgO
MgO + H2SO4 → MgSO4 + H2O
MgSO4 + Na2CO3 → MgCO3 + Na2SO4
(c) (i) Sodium sulphate solution
(ii) MgCO3
(d) MgCO3 + 2HCl → MgCl2 + CO2 + H2O
(e) Mg2+ + CO32- → MgCO3
(f) MgCO3 → MgO + CO2
(g) Na+ and SO42- ions.

Answer 5

(a) Magnesium carbonate
(b) Mg + O2 → MgO
MgO + H2SO4 → MgSO4 + H2O
MgSO4 + Na2CO3 → MgCO3 + Na2SO4
(c) (i) Sodium sulphate solution
(ii) MgCO3
(d) MgCO3 + 2HCl → MgCl2 + CO2 + H2O
(e) Mg2+ + CO32- → MgCO3
(f) MgCO3 → MgO + CO2
(g) Na+ and SO42- ions