Section 4a) Acids, Alkalis and Salts

Question 1

4.1- What colour is universal indicator with acid?

Answer 1

Red

Question 2

4.1-What colour is universal indicator with Alkali?

Answer 2

Purple

Question 3

4.1-What colour is Litmus paper with acid?

Answer 3

Red

Question 4

4.1-What colour is Litmus paper with alkali?

Answer 4

Blue

Question 5

4.1-What colour is methyl orange with acid?

Answer 5

Red

Question 6

4.1-What colour is methyl Orange with alkali?

Answer 6

Yellow

Question 7

4.2- What is the ph range of strong acids?

Answer 7

0-3

Question 8

4.2-What is the ph range for weak acids?

Answer 8

4-6

Question 9

4.2-What is the ph for neutral?

Answer 9

7

Question 10

4.2-What is the ph range for weak alkalis?

Answer 10

8-10

Question 11

4.2-What is the ph range for strong alkalis?

Answer 11

11-14

Question 12

4.4-Acids are sources of what ions?

Answer 12

Acids produce hydrogen ions, H+

Question 13

4.4-Alkalis are a source of what ions?

Answer 13

They produce hydroxide ions, OH-

Question 14

4.6-What common salts are soluble in water?

Answer 14

Sodium, potassium and ammonium

Question 15

4.6-Are all common sodium, potassium and ammonium salts soluble or insoluble in water?

Answer 15

Soluble

Question 16

4.6-Are nitrates soluble or insoluble?

Answer 16

Soluble