Question

What are the coefficients to make the following equation balanced? Why?
Mg2N2(aq) + H2O (I) ------------ NH3(g) + Mg(OH)2 (aq)

Answer 1

Answer on Question #76962, Chemistry / Organic Chemistry

Question:

What are the coefficients to make the following equation balanced? Why?

$$\mathrm{Mg_2N_2(aq)} + \mathrm{H_2O(l)} \rightarrow \mathrm{NH_3(g)} + \mathrm{Mg(OH)_2(aq)}$$

Answer:

There is a misprint in the task. It must be $\underline{\mathbf{Mg}_3\mathbf{N}_2}$.

In the balanced equation the quantities of atoms of reagents must be equal to quantities of atoms of products (for each chemical element). So:

$$\mathrm{Mg_3N_2(aq)} + 6\mathrm{H_2O(l)} \rightarrow 2\mathrm{NH_3(g)} + 3\mathrm{Mg(OH)_2(aq)}$$

We have 3 atoms of Mg before and 3 after, 12 atoms of hydrogen before and 12 after, and so on.

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