Chapter 6 - Acids, bases and salts

Question 1

Acid + alkali ➡️

Answer 1

Salt + water (neutralisation)

Question 2

Acid + metal oxide ➡️

Answer 2

Salt + water

Question 3

Acid + metal carbonate ➡️

Answer 3

Salt + water + carbon dioxide

Question 4

Acid + metal hydrogen carbonate ➡️

Answer 4

Salt + water + carbon dioxide

Question 5

Alkalis produce

Answer 5

OH- ions

Question 6

Making salts from metals or insoluble bases

Answer 6

Gradually add a metal or insoluble base to acid until all acid has reacted. Filter mixture to remove excess solid reactant to leave a solution of is salt when water is evaporated and it crystallises.

Question 7

Ionic equation for neutralisation

Answer 7

H+ (aq) +OH- (aq) ➡️ H2 (l)

Question 8

Precipitation

Answer 8

Removes metal ions from industrial wastewater.

Question 9

Insoluble salts formed by

Answer 9

Mixing solutions of soluble salts that contain the ions needed

Question 10

Limestone

Answer 10

Damaged by acid rain as the calcium carbonate reacts with the acid. Calcium hydroxide solution = limewater.

Question 11

Thermal decomposition

Answer 11

Breakdown by heating

Question 12

Titration (x6)

Answer 12

Pierre measures volume of alkali to put into conical flask and indicator is added. Swirl conical flask to mix. Pour acid into burette after washing with distilled water, record reading and open tap to release small amount of acid into conical flask, swirl, repeat until indicator changes colour. Record burette reading to get vol acid used. X3 and work out avg.

Question 13

Acid + metal ➡️

Answer 13

Salt + hydrogen