If aqueous solutions of potassium chromate and barium chloride are mixed, a bright yellow solid (barium chromate) forms and settles out of the mixture, leaving potassium chloride in solution. Write a balanced chemical equation for this process.

K₂CrO₄ (aq) +  BaCl₂ (aq) → BaCrO₄ (s) ↓ + 2KCl (aq)

Explanation:

K₂CrO₄ → Potassium chromate

This salt dissociates as this: K₂CrO₄ →  2K⁺  +  CrO₄⁻²

BaCl₂ → Barium chloride

This salt dissociates as this: BaCl₂ → Ba²⁺ +  2Cl⁻

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.