pH Scale

Question 1

Colour of a strong acid

Answer 1

Red/ orange

Question 2

What is the colour of neutral on pH scale

Answer 2

7 green

Question 3

acids (numbers on pH scale)

Answer 3

0-6

Question 4

Alkalis numbers on pH scale

Answer 4

8-14

Question 5

What are two ways you can measure the pH of a solution

Answer 5

pH meter and universal indicator paper

Question 6

3 ways to measure the pH

Answer 6

pH meter, universal indicator or UI paper

Question 7

What does the pH scale do

Answer 7

Measure of acidity of alkalinity of a solution

Question 8

What is hydrochloric acid (formula)

Answer 8

HCl

Question 9

What is sulphuric acid formula

Answer 9

H2SO4

Question 10

What is the formula of carbonic acid

Answer 10

H2CO3

Question 11

Do strong acids fully or partly dissociate

Answer 11

Fully

Question 12

What is complete dissociation

Answer 12

Where a solution has none of the original molecules remaining after reacting

Question 13

What is a base

Answer 13

A metal oxide or hydroxide that react with acids to produce salt and water

Question 14

What salt does hydrochloric acid make

Answer 14

(Metal) chloride

Question 15

What salt does sulphuric acid make

Answer 15

(Metal) sulphate

Question 16

What salt does nitric acid form

Answer 16

(Metal) nitrate

Question 17

hydrochloric, sulphuric and nitric acids are all examples of…

Answer 17

Strong acids

Question 18

What is a salt?

Answer 18

An acid where the hydrogen has been removed and replaced with a metal

Question 19

How do you write the name of a salt?

Answer 19

Metal + salt formed from acid

eg. magnesium chloride (hydrochloric acid + magnesium)

Question 20

What does an acid + metal produce

Answer 20

salt + hydrogen

Question 21

What does an acid + metal oxide produce

Answer 21

salt + water

Question 22

What does an acid + metal carbonate produce

Answer 22

salt + carbon dioxide + water

Question 23

What makes an acid strong

Answer 23

When it is fully ionised in an aqueous solution

Question 24

small amount of solvent and lots of solute

concentrated or dilute?

Answer 24

Dilute

Question 25

what is concentrated

Answer 25

little amount of solute and large volume of solvent (acid)

Question 26

All acids are…? (State symbol)

Answer 26

(aq)

Question 27

What is the copper (II) oxide formula

Answer 27

CuO

Question 28

In the required practical what does filtering the solution do?

Answer 28

Removes unreacted CuO that was added after its maximum that could dissolve in the amount of acid.