Acids And Alkali

Question 1

What are the qualities of alkali? (3)

Answer 1

• Tastes bitter
• Feels slippery
• Corrosive and Irritating

Question 2

What are the qualities of acids? (2)

Answer 2

• Tastes sour
• Corrosive and irritating

Question 3

What are some common acids? (3)

Answer 3

• Citric Acid (fruits)
• Ascorbic Acid (vitamin C)
• Carbonic Acid (soft drinks)

Question 4

What is HCI?

Answer 4

Hydrochloric acid

Question 5

Common alkalis (4)

Answer 5

• Potassium hydroxide
• Sodium hydroxide
• Ammonia
• Limewater

Question 6

What is a concentrated acid?

Answer 6

Has a lot of acid particles compared to water particles

Question 7

What is a dilute acid?

Answer 7

Has only a few acid particles compared to water particles

Question 8

What are some natural indicators? (4)

Answer 8

Pigment, strawberry, Red Rose, cabbage

Question 9

What is a universal indicator?

Answer 9

Mixture of several indicators

Question 10

Examples of indicators

Answer 10

Universal indicator, pH paper

Question 11

What is the use of indicators?

Answer 11

To tell how acidic/ alkaline a solution is

Question 12

How many ph values are there in the range of a pH scale?

Answer 12

14

Question 13

Is pH value less than 7 acidic alkaline

Answer 13

Acidic

Question 14

Is the pH value greater than 7 acid or alkaline

Answer 14

Alkaline

Question 15

What is the problem with ph paper

Answer 15

It cannot be used to measure a liquid with dark colour

Question 16

What is the use of pH meter

Answer 16

To measure the exact pH value