Copper is extracted from metal ores.

Chalcocite is a copper ore containing a compound with the formula $Cu2S\text{Cu}_2\text{S}$ .

$Cu2S\text{Cu}_2\text{S}$ reacts with oxygen to produce copper(I) oxide and sulfur dioxide. Complete the equation for this reaction. You should balance the equation.

2\text{Cu}_2\text{S} + \text{\quad\quad\quad\quad\quad} \rightarrow 2\text{Cu}_2\text{O} + 2\text{SO}_2

Calculate the percentage by mass of copper in $Cu2S\text{Cu}_2\text{S}$ .

Relative atomic masses ( $ArA_{\text{r}}$ ):

$S=32\text{S} = 32$
$Cu=63.5\text{Cu} = 63.5$

Describe a chemical test to show the presence of sulfate ions ( $SO42−\text{SO}_4^{2-}$ ) in a solution of copper(II) sulfate. Give the result of the test.

Test:
Result:

Copper can be extracted from low-grade ores by phytomining. Describe what is meant by phytomining.

Copper is extracted from metal ores.

Chalcocite is a copper ore containing a compound with the formula $Cu2S\text{Cu}_2\text{S}$ .

$Cu2S\text{Cu}_2\text{S}$ reacts with oxygen to produce copper(I) oxide and sulfur dioxide. Complete the equation for this reaction. You should balance the equation.

2\text{Cu}_2\text{S} + \text{\quad\quad\quad\quad\quad} \rightarrow 2\text{Cu}_2\text{O} + 2\text{SO}_2

Calculate the percentage by mass of copper in $Cu2S\text{Cu}_2\text{S}$ .

Relative atomic masses ( $ArA_{\text{r}}$ ):

$S=32\text{S} = 32$
$Cu=63.5\text{Cu} = 63.5$

Describe a chemical test to show the presence of sulfate ions ( $SO42−\text{SO}_4^{2-}$ ) in a solution of copper(II) sulfate. Give the result of the test.

Test:
Result:

Copper can be extracted from low-grade ores by phytomining. Describe what is meant by phytomining.

3 Quantitative chemistry

Question 34

Markscheme

3 Quantitative chemistry

Question 34

Markscheme

3 Quantitative chemistry

Question 34

3 Quantitative chemistry Questions

3 Quantitative chemistry

Question 34

3 Quantitative chemistry Questions