Acids And Metals

Question 1

What does effervescence mean?

Answer 1

Fizzing

Question 2

What is the test for hydrogen?

Answer 2

~ put the metal in test tube with an acid
~ observe for effervescence
~ if so, hold a lighted wooden splint over the top of the test tube
~ if hydrogen is present, the lighted splint will pop

Question 3

What is the test for carbon dioxide?

Answer 3

~ put the acid in a boiling tube, and some limewater in a test tube
~ add the metal carbonate to the acid
~ bubble the gas through the limewater using a bung and a delivery tube attached
~ if there is carbon dioxide present, the limewater will turn cloudy

Question 4

If the solution of a metal and acid effervesces, but the lighted splint doesn’t pop in the test for hydrogen, what does this mean?

Answer 4

Hydrogen was made (so there was effervescence), but not enough was made to make the lighted splint pop.

Question 5

Acid + metal —>

Answer 5

Hydrogen + salt

Question 6

Hydrochloric acid + magnesium —>

Also include the balanced symbol equation

Answer 6

Hydrogen + magnesium chloride

2HCl(aq) + Mg(s) —> H2(g) + MgCl2(aq)

Question 7

Sulphuric acid + zinc —>

Also include the balanced symbol equation

Answer 7

Hydrogen + zinc sulphate

H2SO4(aq) + Zn(s) —> H2(g) + ZnSO4(aq)

Question 8

Metal carbonate + acid —>

Answer 8

Salt + water + carbon dioxide

Question 9

Copper carbonate + sulphuric acid —>

Also give the balanced symbol equation

Answer 9

Copper sulphate + water + carbon dioxide

CuCO3(s) + H2SO4(aq) —> CuSO4(aq) + H2O(l) + CO2(g)

Question 10

____________ _____________ + ___________ _____ —> magnesium sulphate + water + carbon dioxide
(Also give the balanced symbol equation)

Answer 10

Magnesium carbonate + sulphuric acid

MgCO3(s) + H2SO4(aq) —> MgSO4(aq) + H2O(l) + CO2(g)