Reacting masses and volumes questions

Assignment: Questions on Reacting masses and volumes

This page of questions can be marked as direct student access either for assigning as a test or for students to work on in their own time. If you do not wish to use student access, links to downloadable versions of the questions and, separately the worked answers, can be found at Printable versions of written tasks.

 

Zinc metal reacts with copper(II) sulfate solution (see right) according to the following equation:


Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s)

 


Determine the maximum mass of copper that can be deposited when 1.20 g of zinc is added to 50.0 cm3 of 2.00 x 10−1 mol dm−3 copper(II) sulfate solution.

5 lines
Show model answer

 

 

Calculate the mass of carbon dioxide produced when 150 cm3 of 1.00 mol dm−3 hydrochloric acid, HCl(aq), is added to 10.0 g of calcium carbonate, CaCO3.

10 lines
Show model answer

 

 

A student prepared ethene by dehydrating ethanol.
C2H5OH(l) → C2H4(g) + H2O(l)
She started with 9.36 g of ethanol and made 2.12 g of ethene.
Calculate the percentage yield she obtained for this reaction.

5 lines
Show model answer

 

 

A sample of gas occupies 67.2 cm3 at a temperature of 22.0 oC and a pressure of 9.38 x 104 Pa.
Calculate the volume the gas will occupy if the temperature is increased to 29.0 oC and the pressure increased to 1.06 x 105 Pa.

5 lines
Show model answer

 

 

2.50 dm3 of gas at a temperature of 19.0 oC and a pressure of 1.01 x 105 Pa has a mass of 4.59 g.
Determine the molar mass of the gas.

3 lines
Show model answer

 

 

The molecular formula of a gaseous hydrocarbon can be determined by combusting it completely in excess oxygen and then passing it through potassium hydroxide solution to absorb the carbon dioxide produced.

In an experiment 200 cm3 of a hydrocarbon was reacted with 1500 cm3 of oxygen. After the hydrocarbon had combusted completely 1000 cm3 of gas remained. This volume was reduced to 200 cm3 after the gas had been passed through a solution of potassium hydroxide. (All volumes were measured under the same conditions of temperature and pressure.)

Deduce the molecular formula of the hydrocarbon.

10 lines
Show model answer

 

 

All materials on this website are for the exclusive use of teachers and students at subscribing schools for the period of their subscription. Any unauthorised copying or posting of materials on other websites is an infringement of our copyright and could result in your account being blocked and legal action being taken against you.