Explain why solid lead iodide takes less time to form when the reaction is repeated using water at a higher temperature.
Which substanceis a gas at 100 °C?
Calculate the mass of solid obtained and the mass of water removed.
Plot the results on the grid.
Draw a circle around the anomalous result
Ignoring the anomalous result, draw a curve of best fit
Suggest two possible mistakes that could have caused the anomalous result.
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.
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]
Determine the temperature at which copper(II) chloride and sodium chloride have the same solubility. Show on the graph how you obtained your answer.
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 substance is a liquid for the largest range of temperature?
Which substance is a liquid at 1000 °C and a gas at2000 °C?