Final answer:
The student's question is about balancing a chemical equation, specifically for a reaction between lead(II) nitrate and aluminum bromide. The equation must be balanced to adhere to the law of conservation of mass, ensuring equal numbers of each atom on both sides.
Step-by-step explanation:
The student's question appears to be about balancing chemical equations, specifically involving the reaction between lead(II) nitrate (Pb(NO3)2) and aluminum bromide (AlBr3). Such a reaction would typically result in a double displacement, where lead would pair with bromide and aluminum with nitrate, forming PbBr2 and Al(NO3)3, respectively. To balance this reaction, we need to ensure that there are equal numbers of each type of atom on both sides of the equation.
Let's apply this by balancing the example chemical equation involving Pb(NO3)2 and NaCl.
Given Equation:
Pb(NO3)2(aq) + 2 NaCl(aq) → 2 NaNO3(aq) + PbCl2(s)
Balance Check:
- 1 Pb atom on both reactant and product sides
- 2 Na atoms on both reactant and product sides
- 2 Cl atoms on both reactant and product sides
- 2 NO3 groups on both reactant and product sides
This demonstrates how to ensure the law of conservation of mass is respected by having an equal number of each type of atom on both sides of the equation.