Explain why solid lead iodide takes less time to form when the reaction is repeated using water at a higher temperature.
1
Question 3
3.
1
1
2
Question 6
6.
Calculate the mass of solid obtained and the mass of water removed.
2
Question 7
7.
3
Question 8
8.
3
Question 9
9.
Plot the results on the grid.
Draw a circle around the anomalous result
Ignoring the anomalous result, draw a curve of best fit
2
Question 10
10.
Suggest two possible mistakes that could have caused the anomalous result.
2
2
2
Question 13
13.
Determine the temperature at which copper(II) chloride and sodium chloride have the same solubility. Show on the graph how you obtained your answer.
2
Question 14
14.
A saturated solution of copper(II) chloride in 100 g of water is cooled from 40 °C to10 °C. Determine the mass, in grams, of copper(II) chloride that crystallises
Which substanceis a gas at 100 °C?
W
X
Y
Z
Question 4
4.
Which substance is a liquid for the largest range of temperature?
Question 5
5.
Which substance is a liquid at 1000 °C and a gas at2000 °C?
Question 11
11.
Use your graph to find the maximum mass of potassium nitrate that dissolves in 25 cm of water at 75 °C. Show on your graph how you obtained your answer.
Question 12
12.
Use your graph to calculate the solubility of potassium nitrate in g per 100 g of water at25 °C. [1.0 cm of water has a mass of 1.0 g]
