Moles 3 - solutions

Question 1

phenolphthalein and methyl orange indicators in acids and alkali

Answer 1

Phenolphthalein:
In acid: colourless
In alkali: pink

Methyl orange:
In acid: red/orange
In alkali: yellow

Question 2

Calculating solution concentrations in mol/dm^3

Answer 2

Concentration = moles / volume (dm^3)

Question 3

Calculating solution concentrations in g/dm^3

Answer 3

Concentration = mass / volume (dm^3)