2.1.4 acids

Question 1

what is an acid

Answer 1

an acid is a proton donor

Question 2

what is a base

Answer 2

a base is a proton acceptor

Question 3

what is an alkali

Answer 3

an alkali is a base that release OH- ions in a solution

Question 4

what is different between a strong acid and a weak acid

Answer 4

a strong acid can fully dissociate into H+ and A- ions in a solution where as a weak acid can only partly dissociate in a solution

Question 5

what is different between a strong base and a weak base

Answer 5

a strong acid can fully dissociate into A+ and OH- ions in a solution where as a weak acid can only partly dissociate in a solution

Question 6

what is the reaction between acids and bases called

Answer 6

neuralisation

Question 7

what is the equation for neutralisation

Answer 7

H+ + OH- → H2O

Question 8

what is formed reacting an acid with a metal carbonate

Answer 8

carbon dioxide, metal salt and water

Question 9

what is formed reacting an acid with a base

Answer 9

water and salt

Question 10

what is formed reacting an acid with a metal

Answer 10

metal salt and hydrogen

Question 11

what is formed reacting an acid with a metal oxide

Answer 11

metal salt and water

Question 12

what is formed reacting an acid with a metal hydroxide

Answer 12

metal salt and water

Question 13

what is formed reacting an acid with a ammonia

Answer 13

ammonium salt

Question 14

what is the process for an acid base titration

Answer 14

fill biuret with solution of known concentration and slowly add to 25cm3 of the unknown concentration until the end point of the reaction is reached
repeat until we have concordant results

Question 15

how do we calculate the unknown concentration from a titration

Answer 15

• find moles of known
• use the balanced equation to find moles of the unknown
• then use concentration = moles / volume to find the concentration