Acids, salts, bases.

Question 1

what are the 2 indicators used in titrations

Answer 1

Methyl orange and phenolphthalein

Question 2

How can you make a soluble salt

Answer 2

option A: insoluble base + acid
option B: acid + alkali

Question 3

How can you make a soluble salt with heating

Answer 3

Heat acid until warm. Add the insoluble base solid. Stir until excess. Filter the content. Heat until crystals just begin to appear. Leave somewhere to evaporate and crystallise.

Question 4

how can you make a soluble salt with titration

Answer 4

Titration then evaporate salt solution until crystals start to appear. allow crystals to form.

Question 5

What is titration

Answer 5

Method of analysing the concentration of solutions. They can measure how much alkali is needed to neutralise a quantity of acids.

Question 6

Explain titration

Answer 6

Measure 25cm^3 of hydrochloric acid using a pipette. Add to conical flask. Fill burette with sodium hydroxide solution. Take reading. Add a few drops of phenolphthalein indicator. Add sodium hydroxide until end point. swirl the flask vigorously. take final readings.

Question 7

what metals will react with dilute acids

Answer 7

any above hydrogen in reactivity series

Question 8

which bases are insoluble

Answer 8

All carbonates apart from sodium, potassium and ammonium. All hydroxides apart from sodium, potassium and calcium

Question 9

which nitrates are insoluble

Answer 9

none

Question 10

which chlorides are insoluble

Answer 10

silver and lead

Question 11

What does an Acid + base make

Answer 11

salt and water

Question 12

what does metal + acid make

Answer 12

If its a metal on its own then salt and hydrogen. If its a metal oxide then salt and water

Question 13

How to make an insoluble salt

Answer 13

Mix two soluble salts, filtering, washing, drying.

Question 14

which sulfates are insoluble

Answer 14

Barium sulfate, Lead sulfate and calcium sulfate