Question

1. aqueous sodium phosphate reacts with aqueous calcium chloride to form solid calcium phosphate and aqueous sodium chloride.

reactants:
products:
balanced equation:

1. liquid ethanol (c₂h₆o) reacts with oxygen gas to produce carbon dioxide gas and water vapor.

reactants:
products:
balanced equation:

Explanation:

Step1: Identify reactants (Q8)

Reactants: Aqueous sodium phosphate ($\text{Na}_3\text{PO}_4$), aqueous calcium chloride ($\text{CaCl}_2$)

Step2: Identify products (Q8)

Products: Solid calcium phosphate ($\text{Ca}_3(\text{PO}_4)_2$), aqueous sodium chloride ($\text{NaCl}$)

Step3: Balance Q8 equation

1. Balance $\text{PO}_4^{3-}$: $2\text{Na}_3\text{PO}_4(aq) + \text{CaCl}_2(aq)

ightarrow \text{Ca}_3(\text{PO}_4)_2(s) + \text{NaCl}(aq)$

1. Balance $\text{Ca}^{2+}$: $2\text{Na}_3\text{PO}_4(aq) + 3\text{CaCl}_2(aq)

ightarrow \text{Ca}_3(\text{PO}_4)_2(s) + \text{NaCl}(aq)$

1. Balance $\text{Na}^+$ and $\text{Cl}^-$: $2\text{Na}_3\text{PO}_4(aq) + 3\text{CaCl}_2(aq)

ightarrow \text{Ca}_3(\text{PO}_4)_2(s) + 6\text{NaCl}(aq)$

Step4: Identify reactants (Q10)

Reactants: Liquid ethanol ($\text{C}_2\text{H}_6\text{O}$), oxygen gas ($\text{O}_2$)

Step5: Identify products (Q10)

Products: Carbon dioxide ($\text{CO}_2$), water vapor ($\text{H}_2\text{O}$)

Step6: Balance Q10 equation

1. Balance $\text{C}$: $\text{C}_2\text{H}_6\text{O}(l) + \text{O}_2(g)

ightarrow 2\text{CO}_2(g) + \text{H}_2\text{O}(g)$

1. Balance $\text{H}$: $\text{C}_2\text{H}_6\text{O}(l) + \text{O}_2(g)

ightarrow 2\text{CO}_2(g) + 3\text{H}_2\text{O}(g)$

1. Balance $\text{O}$: $\text{C}_2\text{H}_6\text{O}(l) + 3\text{O}_2(g)

ightarrow 2\text{CO}_2(g) + 3\text{H}_2\text{O}(g)$

Answer:

Question 8:

Reactants: Aqueous sodium phosphate ($\text{Na}_3\text{PO}_4$), aqueous calcium chloride ($\text{CaCl}_2$)
Products: Solid calcium phosphate ($\text{Ca}_3(\text{PO}_4)_2$), aqueous sodium chloride ($\text{NaCl}$)
Balanced equation: $2\text{Na}_3\text{PO}_4(aq) + 3\text{CaCl}_2(aq)
ightarrow \text{Ca}_3(\text{PO}_4)_2(s) + 6\text{NaCl}(aq)$

Question 10:

Reactants: Liquid ethanol ($\text{C}_2\text{H}_6\text{O}$), oxygen gas ($\text{O}_2$)
Products: Carbon dioxide gas ($\text{CO}_2$), water vapor ($\text{H}_2\text{O}$)
Balanced equation: $\text{C}_2\text{H}_6\text{O}(l) + 3\text{O}_2(g)
ightarrow 2\text{CO}_2(g) + 3\text{H}_2\text{O}(g)$