Question

using a suitable chemical equation justify that some chemical reactions are determined​

Answer 1

Explanation:

bdndjdkdmjjskkskskdk£dddffgngnnmjkmkkkkk h2so4 + hcl = nacl + h2 o

Answer 2

answer

Using suitable chemical equation, justify that some chemical reactions are determined by: i. Change in colour ii. Change in temperature using-suitable-chemical-equation-justify-chemical-reactions-determined-change-colour

explanation

i. When copper powder is heated in air, it combines with oxygen to form copper oxide. Here, the reddish brown coloured copper changes to black copper oxide.

Thus, change in colour indicates that a chemical reaction has taken place.

ii. Sodium reacts with water vigorously to form sodium hydroxide and hydrogen gas releasing a large amount of heat. As a result, the temperature of the reaction mixture increases. Thus, change in temperature indicates that a chemical reaction has taken