After fifteen years on the examination board, I always ask about the common ion effect on solubility of lead chloride and the confirmatory test for sulphate using barium chloride. Students memorise steps, but I look for the understanding of why the precipitate forms in acidic medium. It reminds me of balancing my sister's accounts—knowing the 'why' behind each entry is what keeps the ledger true.
#exams#study
Jump in to reply — no account needed.