Question

balance the reaction, do not leave any fractions, dont leave anything blank, then answer the questions about the reaction
1 mg(oh)₂ + 2 h₃po₄ → 3 mg₃(po₄)₂ + 4 h₂o
this is an 5 reaction and also a 6 reaction (in the order given in the answers).
is this a redox reaction? (yes/no)7, because neither mg⁺², po₄⁻³, h⁺¹, nor oh⁻¹ change oxidation state.
will the reaction happen as it is written? (yes/no)8, because acids and bases are reactive and because h₂o is 9. the reverse reaction would not happen.
a. 1 b. 2 c. 3 d. 4 e. 5 f. 6 g. 7 h. 8
i. 9 j. 10 k. 12 l. 14 m. 16 n. 18 o. 20 p. 21
q. 24 r. 26 s. 28 t. synthesis u. decomposition
v. single displacement w. double displacement x. neutralization
y. combustion z. yes aa. no bb. reactive cc. stable
dd. oxidized ee. reduced

Explanation:

Step1: Balance Mg atoms

On the right - hand side, there are 3 Mg atoms in \(Mg_3(PO_4)_2\). So, we put a coefficient of 3 in front of \(Mg(OH)_2\) on the left - hand side.
\(3Mg(OH)_2 + 2H_3PO_4
ightarrow Mg_3(PO_4)_2+6H_2O\)

Step2: Balance P atoms

There are 2 P atoms in \(H_3PO_4\) and 2 P atoms in \(Mg_3(PO_4)_2\).

Step3: Balance O and H atoms

For \(Mg(OH)_2\): 3 moles of \(Mg(OH)_2\) have \(3\times2 = 6\) OH⁻ groups. 2 moles of \(H_3PO_4\) have \(2\times3=6\) H⁺ groups. The reaction between OH⁻ and H⁺ gives \(H_2O\). The number of \(H_2O\) molecules is 6.

For the reaction type:

• It is a neutralization reaction (\(X\)) because an acid (\(H_3PO_4\)) reacts with a base (\(Mg(OH)_2\)) to form salt (\(Mg_3(PO_4)_2\)) and water.
• It is also a double - displacement reaction (\(W\)) as the ions (\(Mg^{2 +}\), \(OH^{-}\), \(H^{+}\), \(PO_4^{3-}\)) exchange their partners.

For the redox reaction question:

• In a redox reaction, there is a change in oxidation states. Since \(Mg^{2+}\), \(PO_4^{3 -}\), \(H^{+}\), and \(OH^{-}\) do not change their oxidation states, the answer is \(AA\) (no).

For the reaction occurrence question:

• Acids and bases are reactive. \(H_2O\) is stable (\(CC\)). So the reaction will happen (\(Z\)).

Answer:

1. \(3\)
2. \(2\)
3. \(1\)
4. \(6\)
5. \(X\) (neutralization)
6. \(W\) (double displacement)
7. \(AA\) (no)
8. \(Z\) (yes)
9. \(CC\) (stable)