Separate samples of magnesium and calcium are placed into an excess of dilute sulfuric acid. The results are shown in the table. Magnesium: reacts vigorously, bubbles of gas are given off, magnesium dissolves completely. Calcium: reacts vigorously at first, bubbles of gas are given off, the reaction soon stops and most of the calcium remains unreacted. Which statement accounts for the difference in these observations?
- ACalcium is a better oxidising agent than magnesium.
- BCalcium is a better reducing agent than magnesium.
- CMagnesium is a more reactive metal with all dilute acids than calcium.
- DMagnesium sulfate is more soluble than calcium sulfate.