acids and redox

Question 1

what is an acid

Answer 1

• they have a pH less than 7
• when dissolved in water, they release H= ions into the solution

Question 2

whats the difference between a strong and a weak acid

Answer 2

• a strong acid = completely dissociates in an aqueous solution
• a weak acid = partially dissociates in aqueous solution

Question 3

what is an alkali

Answer 3

• a base that dissolves in water, releasing OH ions

Question 4

what is a base

Answer 4

• something that reacts with an acid to form a salt

Question 5

what happens when an acid reacts with a base

Answer 5

• the H ions and the OH ions react to form a salt and water

Question 6

what is an ionic equation

Answer 6

• it contains only the ions that take part in the reaction, and doesn’t contain any spectator ions

Question 7

what is the observation when an acid reacts with metal oxides

Answer 7

• the solid metal oxide will disappear

Question 8

what is the observation when an acid reacts with a metal carbonate

Answer 8

• the solid metal carbonate will disappear
• bubbles of gas will form