MCQ
Which of the following is paramagnetic in nature?
- A${\left[ Zn \left( NH _3\right)_4\right]^{2+}}$
- B${\left[ Co \left( NH _3\right)_6\right]^{3+}}$
- ✓${\left[ Ni \left( H _2 O \right)_6\right]^{2+}}$
- D${\left[ Ni ( CN )_4\right]^{2-}}$
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The hydrogen ion concentration of a buffer solution consisting of a weak acid and its salts is given by
$
\left[ H ^{+}\right]= K _{ a } \frac{[ acid ]}{[\text { salt }]}
$
$
\left.\left[ H ^{+}\right]= K _{ a } \text { [salt }\right]
$
$
\left[ H ^{+}\right]= K _{ a } \text { [acid] }
$
$
\left[ H ^{+}\right]= K _{ a } \frac{[\text { salt }]}{[\text { acid }]}
$