Nature of matter & chemical change questions

Assignment: Questions on Nature of matter and chemical change

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.

 

State the equation (including state symbols) for the following reactions.

i. The addition of dilute hydrochloric acid to solid calcium carbonate to give aqueous calcium chloride, carbon dioxide and water.

1 line
Show model answer


ii. The reaction between ammonia gas and oxygen gas to give nitrogen(II) oxide gas and water.

1 line
Show model answer

 

 

State the ionic equation for the following reactions.

i.  BaCl2(aq)  +  2AgNO3(aq)  →  Ba(NO3)2(aq)  +  2AgCl(s)

1 line
Show model answer

ii. Na2CO3(aq)  +  2HCl(aq)  →  2NaCl(aq)  +  CO2(g)  +  H2O(l)

1 line
Show model answer

 

 

Outline how the following mixtures could be separated into their individual components.

i. A saturated solution of sodium chloride

1 line
Show model answer

ii. A mixture of hexane and octane

1 line
Show model answer

iii. An ink that contains two coloured dyes

1 line
Show model answer

 

 

The diagram below shows a cooling curve for stearic acid.

i. Determine the melting point of stearic acid.

1 line
Show model answer

ii. Explain why the temperature remains constant between B and C.

3 lines
Show model answer

 

 

The metal tungsten, W, can be prepared by reducing powdered tungsten(VI) oxide using hydrogen gas at 850 oC.

The equation for the reaction is:

                WO3(s)  +  3H2(g)  → W(s)  +  3H2O(g)

   Calculate the atom economy for this reaction.

5 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.