Synthesis

Question 1

Dissolving

Answer 1

Aids the reaction by increasing collisions

Question 2

Filtration

Answer 2

This separates the insoluble solids from liquids to remove the product from the mixture

Question 3

Crystallisation

Answer 3

This forms crystals from a solution by removing the solvent

Question 4

Evaporation

Answer 4

This forms a powder from a solution by removing the solvent

Question 5

Drying

Answer 5

In an oven or desiccator

Removes water left in the product

Question 6

What are the stages of synthesis

Answer 6

1. Deciding which chemicals to use
2. Risk assessment
3. Mass needed to make a certain mass of product to limit waste
4. Select equipment conditions and concentration
5. Make product
6. Purify product
7. Measure the purity by titration to ensure it is suitable for use

Question 7

Metal + acid

Answer 7

Salt + hydrogen

Question 8

Acid + metal oxide

Answer 8

Salt + water

Question 9

Acid + metal hydroxide

Answer 9

Salt + water

Question 10

Metal Carbonate + acid

Answer 10

Salt + water + co2

Question 11

Stages of titration

Answer 11

1. Add acid to burette and record initial volume
2. Measure alkali in volumetric pipette using a pipette filler, add to conical flask
3. Add a few drops of indicator
4. Slowly add acid to flask until colour change
5. Record final volume

Question 12

To make a titration more accurate

Answer 12

Flask on white tile
Repeat until you get consistent results
Swirl the flask as acid is added
Add acid drop by drop