AP EAMCET201823 Apr 2018Morning ShiftChemistryIonic EquilibriumActual
Arrange the aqueous solutions of the following salts in the increasing order of pH array ccc CuSO ₄ & NaCN & KCl I & II & III array
Options
- AI < II < III
- BI < III < II
- CIII < II < I
- DII < III < I
Correct answer
B. I < III < II
Step-by-step solution
NaCN is the salt of strong base ( NaOH ) and weak acid (HCN). So, its pH >7 . CuSO ₄ is a salt of strong acid ( H ₂ SO ₄ ) and a weak base [ Cu ( OH )₂ . , thus its solution is acidic with pH < 7 . KCl is a salt of strong acid ( HCl ) and a strong base [ KOH ] , thus its solution is neutral with pH =7 . Increasing order of pH is array ccc CuSO ₄ & < KCl & < NaCN I & III & II array