Question

quiz 1 - chemical reactions
balance the equation:
□ga + □h₂so₄ → □ga₂(so₄)₃ + □h₂
type of reaction:

Explanation:

Step1: Balance Ga atoms

On the right, there are 2 Ga atoms in $\ce{Ga2(SO4)3}$. So, put a coefficient of 2 in front of $\ce{Ga}$ on the left.
$2\ce{Ga} + \ce{H2SO4}
ightarrow \ce{Ga2(SO4)3} + \ce{H2}$

Step2: Balance $\ce{SO4^{2-}}$ ions

On the right, there are 3 $\ce{SO4^{2-}}$ ions in $\ce{Ga2(SO4)3}$. So, put a coefficient of 3 in front of $\ce{H2SO4}$ on the left.
$2\ce{Ga} + 3\ce{H2SO4}
ightarrow \ce{Ga2(SO4)3} + \ce{H2}$

Step3: Balance H atoms

On the left, there are $3\times2 = 6$ H atoms in $3\ce{H2SO4}$. On the right, there are 2 H atoms in $\ce{H2}$. So, put a coefficient of 3 in front of $\ce{H2}$ on the right to balance H (since $3\times2 = 6$ H atoms).
$2\ce{Ga} + 3\ce{H2SO4}
ightarrow \ce{Ga2(SO4)3} + 3\ce{H2}$

Step4: Determine reaction type

This is a single - replacement reaction because Ga (a metal) replaces H in $\ce{H2SO4}$ (an acid), following the pattern $A + BC
ightarrow AC + B$ where A is Ga, B is H, and C is $\ce{SO4^{2-}}$.

Answer:

Balanced equation: $\boldsymbol{2}\ce{Ga} + \boldsymbol{3}\ce{H2SO4}
ightarrow \boldsymbol{1}\ce{Ga2(SO4)3} + \boldsymbol{3}\ce{H2}$
Type of reaction: Single - replacement reaction (also known as single - displacement reaction)