Question

7. o. In which solution can gold be dissolved? Write the constituents of the solution.
b. Nome an indicator that indicates the various levels of hydrogen ion concentration.
c. Why is hydrochloric acid a strong acid and acetic acid a weak acid?​

Answer 1

Answer:

a. Gold can we disolved in aqua regia(3HCl+HNO3)

b. ph paper

c. because Hydrochloric acid contains more H+ ions which ionises in water

and acetic acid contains less H+ ions.

Answer 2

Explanation:

7.a) Aqua regia is a mixture of concentrated hydrochloric acid and nitric acid in the ratio of 3:1, and can dissolve noble metals like gold.

b)Universal Indicator

c)HCl is a strong acid because it has more number of hydrogen ions whereas acetic acid contains less number of hydrogen ions so its a weak acid , it can be varied by changing number of hydrogen ions in them .