Acids and Titrations Test

Question 1

Concentration Formula

Answer 1

Concentration (mol/dm³) = moles (mol) /volume (dm³)

Question 2

How to make a salt?

Answer 2

acid + base –> salt + water

e.g.:

sulfuric acid + copper oxide –> copper sulfate + water

Question 3

How to make an Ammonium Fertiliser

Answer 3

acid + alkali –> salt + water

e.g.:

sulfuric acid + ammonia solution –> ammonium sulfate + water

Question 4

What is used to test for halide ions?

Answer 4

Silver Nitrate (AgNO³)and Nitric Acid HNO3 mixed together
A white precipitate will form if halide ions are detected.

Question 5

What is used to test for metal ions?

Answer 5

Flame Test

Question 6

How to test for sulfate ions?

Answer 6

1) Add barium chloride to the sample
2) If sulfate ions are present, a white precipitate of Barium Sulfate will form.

Question 7

How to test for carbonate ions?

Answer 7

1) Add an acid (e.g.: HCL) to a sample.
2) If a fizzing reaction occurs, this means a gas has been formed.
3) To test the gas for carbonate ions, bubble it through limewater (calcium hydroxide) as limewater is a test for carbon dioxide ( a product of a reaction between carbonate ions and dilute acids)
4) If the lime water turns milky and cloudy then carbon dioxide is present and so are carbonate ions.

Question 8

What does a titration experiment test for?

Answer 8

A titration experiment calculates the concentration of an acid or an alkali.

Question 9

Equipment needed to construct a

Question 10

The flame test colours for the five most common metal cations are:

Answer 10

Lithium, Li+ is Crimson
Sodium, Na+ is Yellow
Potassium, K+ is Lilac
Calcium, Ca2+ is Orange-red
Copper, Cu2+ is Green