Question

Write a balanced equation for the reactions below.**

A. \(KNO_3 + Al(NO_3)_3 \rightarrow 3KNO_3 + Al\)

B. \(Ca(OH)_2 + 2FeCl_3 \rightarrow CaCl_2 + 2Fe(OH)_3\)

C. \(2Na(NO_3) + MgCl_2 \rightarrow 2NaCl + Mg(NO_3)_2\)

D. \(KNO_3 + 3Al(NO_3)_3 \rightarrow 3KNO_3 + Al\)

Answer 1

Equations B and C provided by the student are already balanced, while equations A and D are not valid chemical reactions and cannot be balanced as no reaction occurs between the reactants.

Step-by-step explanation:

The correct balanced equations for each reaction provided are as follows:

1. For the first equation, A. KNO3 + Al(NO3)3, there is already a typo since the reactants and products are the same. The equation provided by the student does not represent a valid chemical reaction and cannot be balanced because a reaction does not occur between KNO3 and Al(NO3)3.
2. B. Ca(OH)2 + 2FeCl3 → CaCl2 + 2Fe(OH)3 is already balanced as shown.
3. C. 2Na(NO3) + MgCl2 → 2NaCl + Mg(NO3)2 is already correctly written and balanced.
4. For the last equation, D. KNO3 + 3Al(NO3)3, it again repeats the issue from the first equation. It does not represent a valid chemical reaction and cannot be balanced since KNO3 cannot react with Al(NO3)3 to produce Al and more KNO3.

Chemical equations must represent real reactions and follow the law of conservation of mass, with atoms of elements being conserved in both the reactants and the products. Therefore, equations A and D as given by the student are not valid and cannot be balanced.