C2 - Acids And Alkalis

Question 1

What pH does the strongest acid have?

Answer 1

0.

Question 2

What pH does the strongest alkali have?

Answer 2

14.

Question 3

What is an indicator?

Answer 3

A dye that changes colour based on pH.

Question 4

What is universal indicator?

Answer 4

A combination of dyes that gives the pH scale.

Question 5

What is universal indicator useful for?

Answer 5

Estimating the pH of a solution.

Question 6

What is an acid?

Answer 6

A substance with a pH of less than 7.

Question 7

What ions do acids form in water?

Answer 7

H+.

Question 8

What is a base?

Answer 8

A substance with a pH of greater than 7.

Question 9

What is an alkali?

Answer 9

A base that dissolves in water.

Question 10

What ions do alkalis form in water?

Answer 10

OH-.

Question 11

What is the reaction between acids & bases?

Answer 11

Neutralisation.

Question 12

What is the word equation for the reaction between acids & bases?

Answer 12

acid + base -> salt + water.

Question 13

What is the ionic equation for the reaction between an acid & a base?

Answer 13

H+ + OH- -> H2O.

Question 14

What pH will the products of a neutralisation reaction have?

Answer 14

7.

Question 15

What colour will universal indicator go at the end of a neutralisation reaction?

Answer 15

Green.

Question 16

What does (s) mean?

Answer 16

Solid.

Question 17

What does (l) mean?

Answer 17

Liquid.

Question 18

What does (g) mean?

Answer 18

Gas.

Question 19

What does (aq) mean?

Answer 19

Aqueous: dissolved in water.

Question 20

What is the pH scale?

Answer 20

A measure of how acidic or alkaline a solution is.

Question 21

Name an everyday use of neutralisation.

Answer 21

Indigestion tablets.