1.answer the following question
i. Identify the compound.
ii. For what purpose is it used in textile industry?
iii. Name the gas released when this compound is left exposed to air.
iv. Write the reaction of this compound with carbon dioxide.
v. Write the reaction of this compound with dilute sulphuric acid.
Answers
Answer:
1. consists of atoms of two or more different elements bound together,
can be broken down into a simpler type of matter (elements) by chemical means (but not by physical means),
has properties that are different from its component elements, and.
always contains the same ratio of its component atoms. 2. The textile industry is primarily concerned with the design, production and distribution of yarn, cloth and clothing. The raw material may be natural, or synthetic using products of the chemical industry. 3. The compound is calcium oxychloride, which is commonly known as bleaching powder. Its chemical formula is CaOCl2. When calcium oxychloride is left open in air, chlorine gas is released. 4. Carbon dioxide as a non-metallic oxide is acidic. Carbon dioxide reacts with water in a reversible reaction to form carbonic acid (H2CO3). The acid dissociation constant for carbonic acid Ka = 4.45 x 10-7 mol dm-3.
5. When sodium carbonate reacts with sulphuric acid, it produces carbon dioxide gas with effervescence.
Carbon dioxide is used as fire extinguisher.
Hence, it extinguishes a burning candle.
Therefore, the metal compound A is sodium carbonate.
Na
2
CO
3
+H
2
SO
4
→Na
2
SO
4
+CO
2
+H
2
O