Asolution containing lead(ii) nitrate is mixed with one containing sodium bromide to form a solution that is 0.0140 m in pb(no3)2 and 0.0024 m in nabr. what is the value of q for the insoluble product? express the reaction quotient to three significant figures.

Explanation:

Since all sodium salts and all nitrates are soluble, the insoluble product must be lead(II) bromide.

The equation for the equilibrium is

                     PbBr₂ ⇌ Pb²⁺  +  Br⁻

I/mol·L⁻¹:                    0.0140  0.0024

= [Pb²⁺][Br⁻]²

[Pb²⁺] = 0.0140 mol·L⁻¹

[Br⁻] = 0.0024 mol·L⁻¹

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.