A student adds solid magnesium oxide (MgO\text{MgO}MgO) to excess distilled water at 298 K and stirs the mixture. Under these conditions, a reaction occurs to form a sparingly soluble product.
Which of the following correctly classifies the chemical nature of magnesium oxide and identifies the most likely pH of the resulting saturated mixture?
Acidic oxide; pH 222
Basic oxide; pH 131313
Amphoteric oxide; pH 777
Basic oxide; pH 999
Practise OCR GCSE Chemistry Types of chemical reactions with exam-style questions for Foundation and Higher tier. 58 questions, matched to the OCR GCSE Chemistry (J248) specification and written in Paper 1 and Paper 2 (Foundation Tier) or Paper 3 and Paper 4 (Higher Tier) style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.