(i) Explain why is hydrochloric acid a strong acid and acetic add, a weak acid. How can it be verified ? OE Explain why aqueous solution of an add conducts electricity ?
(lii) You have four solutions A, B, C and D. The pH of solution A is 6, B is 9, C is 12 and D is 7,
(a) Identify the most acidic and most basic solutions.
(b) Arrange the above four solutions in the increasing order NH" ion concentration.
(c) State the change in colour of pH paper on dipping in solution C and D.
CBSE Class X Science LA (5 Marks)
Answers
Answer:
Because hydrochloric acid is reactive than acetic acid electricity pass through hydrochloric acid
Explanation:
i. HCl is a strong acid because it has more hydrogen ions, while acetic acid includes less hydrogen ions so it is a weak acid that it can vary by altering the amount of hydrogen ions in it.
ii. A solution with a high number of hydrogen ions is acidic in nature and has the low pH value. Anything which is below the value of 7.0 is acidic and anything which is above 7.0 is basic or alkaline.
Thus, the arrangement will be -
Increasing order of concentration of H+ ion is: A > D > B > C
The most acidic solution - A and the most basic solution - C
The change in colour of pH paper on dipping in solution C and D will be - In C- blue and in D- green