complete the sheet
Answers
Answer:
1. Indicators are substances which show a change in colour when brought in contact with acids and bases. The most common indicator used in the laboratory is the litmus. It is extracted from lichens and is available either in the form of solutions or in the form of strips of paper known as litmus paper.
2.a)water.
B) When an acid reacts with metal, a salt and hydrogen are produced: acid + metal → salt + hydrogen An example: nitric acid + calcium → calcium nitrate + hydrogen The salt that is produced depends upon which acid and which metal react.
C) When an acid reacts with a metal carbonate a salt, carbon dioxide and water are formed. ... Hydrochloric acid reacts with calcium carbonate to form calcium chloride, carbon dioxide and water.