Science- Chemistry- Acids, Bases and Salts Set 2

Na₂C0₃ . 7H₂O ✘ Na₂C0₃ . 5H₂O ✘ Na₂C0₃ . 2H₂O ✘ Na₂C0₃ . 10H₂O ✔

white ✘ bluish-green ✘ blue-black ✘ black ✔

as an antacid ✘ in manufacture of soap ✘ as a cleansing agent ✘ in alkaline batteries ✔

pH falls below 7 ✘ pH falls below 6 ✘ pH falls below 5.6 ✘ pH is above 7 ✔

weak base ✘ weak acid ✘ strong base ✘ strong acid ✔

Baking powder ✘ Lime ✘ Ammonium hydroxide solution ✘ Hydrochloric acid ✔

calcium phosphate ✘ calcium carbonate ✘ calcium carbonate ✘ potassium ✔

7.0 - 7.8 ✘ 7.2 - 8.0 ✘ 7.0 - 8.4 ✘ 7.2 - 8.4 ✔

bleaching powder ✘ baking powder ✘ baking soda ✘ washing soda ✔

MetiWanoic acid ✘ Lactic acid ✘ Citric acid ✘ Tartaric acid ✔