Extra From Sam Learning

Question 1

What is adding oxygen to a substance called?

Answer 1

Oxidation

Such as FeO

Question 2

What is removing oxygen from a substance called?

Answer 2

Reduction

Such as O2 becoming O

Question 3

What do you get if you add a strong acid to a weak alkali?

Answer 3

Weak acid

Question 4

What do you get if you add a strong alkali to a weak acid?

Answer 4

A weak alkali

Question 5

What do you get if you add a strong acid to a strong alkali?

Answer 5

A neutral solution

Question 6

What colour is a strong alkali on the universal indicator?

Answer 6

Purple

Question 7

What colour is a weak alkali on the universal indicator?

Answer 7

Light blue

Question 8

What colour is a weak acid on a universal indicator?

Answer 8

Yellow

Question 9

What colour is a strong acid on a universal indicator?

Answer 9

Red

Question 10

What is the symbol for gold?

Answer 10

Au

Question 11

What is oxidised iron called in layman’s terms?

Answer 11

Iron ore

Question 12

What colour is a neutral solution on a universal indicator?

Answer 12

Green

Question 13

In a chemical reaction what stays the same?

Answer 13

Total mass

Question 14

Is the pH scale linear or logarithmic?

Answer 14

Logarithmic

So a pH of 5 is 10 times more acid than 6

Question 15

Universal indicator is made from the purple pigment of what vegetable?

Answer 15

Red cabbage