Which compounds are soluble?

Which compounds are soluble?

Pencil and paperOnline interactive
Overview
Connecting to the Curriculum
Marking Student Responses
This task is about compunds that are "soluble".
Soluble is being able to dissolve with another substance such as water. Insoluble is not being able to dissolve with another substance. To test which compounds were soluble in water Robyn took a pinch of each and tried to dissolve it. Her results are in the table below.
indicates the compound was soluble           x  indicates the compound was insoluble
sodium carbonate     sodium sulphate     sodium hydroxide     sodium nitrate    
copper carbonate    x copper sulphate     copper hydroxide    x copper nitrate    
calcium carbonate    x calcium sulphate    x calcium hydroxide    x calcium nitrate    
potassium carbonate     potassium sulphate     potassium hydroxide     potassium nitrate    
 
Use the table to determine whether each of the following statements are true or false, and name all the compounds which support your answer.

Question 2Change answer

a)  i)   All sodium compounds are soluble. TrueFalse
ii)  Name all the sodium compounds that support your answer.

Question 2Change answer

b)  i)  Most sulphate compounds are soluble.  TrueFalse
     ii) Name all the sulphate compounds that support your answer.

Question 2Change answer

c)  i)  All copper compounds are insoluble.  TrueFalse
    ii)  Name all the copper compounds that support your answer.

Question 2Change answer

d)   i)  All nitrates and potassium compounds are soluble.  TrueFalse
     ii)
Name all the nitrate compounds that support your answer.
Name all the potassium compounds that support your answer.
Level:
5
Curriculum info: 
Science, Investigating in science, Material World
Keywords: 
properties, solubility, precipitates, table interpretation
Description of task: 
Students use a table on solubility/insolubility of 16 compounds to determine the validity of four statements and justify with evidence from the table.
Curriculum Links: 
Science capabilities
The capabilities focus is brought about by the conversations you have and the questions you ask.
 
Capability: Use evidence
This resource provides opportunities to discuss use data/evidence in a table to support your decisions.
Science capabilities: 
Use evidence
Answers/responses: 
   Y10 (09/1997)
A) i)
ii)		 True
Sodium carbonate, sodium sulphate, sodium hydroxide, sodium nitrate		 easy
B) i)
ii)		 True
Sodium sulphate, copper sulphate, potassium sulphate		 easy
C) i)
ii)		 False
Copper sulphate and copper nitrate		 moderate
D) i)
ii)		 True
a) Sodium nitrate, copper nitrate, calcium, nitrate, potassium nitrate
b) Potassium carbonate, potassium sulphate, potassium hydroxide, potassium nitrate		 easy 
easy