Question

when heated, copper carbonate turns into copper oxide and carbon dioxide. word equation:
balanced symbol equation:
combination reaction?

Explanation:

Step1: Write word equation

Word equation shows reactants and products in words. Reactant is copper carbonate, products are copper oxide and carbon dioxide. So word equation is: Copper carbonate → Copper oxide + Carbon dioxide.

Step2: Write chemical formulae

Chemical formula of copper carbonate is \(CuCO_{3}\), of copper oxide is \(CuO\) and of carbon dioxide is \(CO_{2}\).

Step3: Balance the symbol equation

The un - balanced equation is \(CuCO_{3}
ightarrow CuO + CO_{2}\).
Count the number of atoms of each element on both sides.

• For \(Cu\): 1 atom on left and 1 atom on right.
• For \(C\): 1 atom on left and 1 atom on right.
• For \(O\): 3 atoms on left (\(1\times3\) from \(CuCO_{3}\)) and \(1 + 2=3\) atoms on right (\(1\) from \(CuO\) and \(2\) from \(CO_{2}\)).

So the balanced symbol equation is \(CuCO_{3}\xlongequal{\Delta}CuO + CO_{2}\uparrow\).

Step4: Determine reaction type

Combination reaction is \(A + B
ightarrow AB\). Here, one reactant \(CuCO_{3}\) breaks into two products \(CuO\) and \(CO_{2}\). So it is not a combination reaction.

Answer:

• Word equation: Copper carbonate → Copper oxide + Carbon dioxide
• Balanced symbol equation: \(CuCO_{3}\xlongequal{\Delta}CuO + CO_{2}\uparrow\)
• Combination reaction? No