Science Chapter 9.1-9.3

Question 1

What are 3 properties of Acid?

Answer 1

1. Sour taste
2. Conduct electricity
3. Reacts with metals (and other materials)

Question 2

What are some food that has Acid in it?

Answer 2

–> citrus fruit + apple + grape
–> yoghurt –> tea
–> spinach –> vinegar

Question 3

What are some home products that as Acid in it?
(body-cleaning agents / cleaning agents / others)

Answer 3

–> body lotion + conditioner
–> toilet cleaner –> aspirin

Question 4

What are the 3 commonly found lab acids? (HSN)

Answer 4

1. Hydrochloric acid
2. Sulphuric acid
3. Nitric acid

Question 5

What are the 3 usage of acid?

Answer 5

1. Preservatives
2. Stain removal
3. Industrial chemicals

Question 6

How does acid in preservatives work?

Answer 6

Stunts the growth/kills microorganisms

Question 7

What is the common acid found in stain removal?

Answer 7

Hydrochloric acid –> toilet cleaners

Question 8

What is the common acid found in industrial chemicals?

Answer 8

Sulphuric acid –> fertilisers, dyes and paint

Question 9

What are 3 properties of alkaline?

Answer 9

1. Bitter taste
2. Conduct electricity
3. Slippery feel m

Question 10

What are some product that is made from alkaline?
(body-cleaning agents / cleaning agents / others)

Answer 10

–> soap + toothpaste
–> glass/kitchen/drain cleaner
–> baking soda –> alkaline battery

Question 11

What are some commonly found alkaline in lab?

Answer 11

–> sodium hydroxide
–> calcium hydroxide
[–> potassium hydroxide]
–> ammonia solution (limewater)

Question 12

What are the 2 common usages of alkaline?

Answer 12

1. Grease removal
2. Industrial chemicals

Question 13

What are the alkaline found in grease removal?

Answer 13

Ammonia –> glass/kitchen cleaner
Sodium hydroxide –> drain cleaner
(heat release –> grease removal)

Question 14

What are the alkaline found in industrial chemicals?

Answer 14

Potassium hydroxide –> alkaline battery

Question 15

What are the 4 safety precautions when handling acid or alkaline?

Answer 15

1. Read hazard warning labels
2. Safety goggles + protective gloves
3. Pour acidic / alkaline waste into waste bottles
4. Wash hands thoroughly after

Question 16

What should you not do when handling acid or alkaline? (2)

Answer 16

X tasting
X mixing alkaline and acid or other substances without the teacher’s instructions

Question 17

4 remedial measures when an chemical with these two does happen?

Answer 17

1. Hand: under slow running water >10 min
2. Clothes: carefully remove, without contact with skin
3. Eyes: wash with eye-wash > 10 min
4. Serious: wash affected area until ambulance comes. Take a sample to the hospital