The \($pH$\) of a solution is \($5.0$\). If \($H ^{+}$\)ion concentration is decreased \($100$\) times. Then the solution will be be :
List-I (Equations)
List-II (Types of process)
A.
$K_p > Q $
1.
Non-spontaneous
B.
$\Delta G^{\circ} < RT \, In \, Q $
2
Equilibrium
C.
$K_p = Q $
3
Spontaneous and endothermic
D.
$T > \frac{\Delta H}{\Delta S}$
4
Spontaneous
Updated On: May 6, 2022
\(\frac{x^2-2}{x}\)
more acidic
basic
of the same acidity
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The Correct Option isB
Solution and Explanation
$pH$ of the solution $=5$$\left[ H ^{+}\right]=10^{-5} M$
On decreasing the $H ^{+}$ion concentration $100$ times the $\left[ H ^{+}\right]$becomes
$=\frac{10^{-5}}{100}=10^{-7} M$
Now $pH =7$, which signifies a neutral solution.
$P = - \frac{xx^T}{x^Tx}$Acid is any hydrogen-containing substance that is capable of donating a proton (hydrogen ion) to another substance. Base is an ion or molecule capable of accepting a hydrogen ion from acid.
Physical Properties of Acids and Bases
Physical Properties
ACIDS
BASES
Taste
Sour
Bitter
Colour on Litmus paper
Turns blue litmus red
Turns red litmus blue
Ions produced on dissociation
H+
OH-
pH
<7 (less than 7)
>7 (more than 7)
Strong acids
HCl, HNO3, H2SO4
NaOH, KOH
Weak Acids
CH3COOH, H3PO4, H2CO3
NH4OH
Chemical Properties of Acids and Bases
Type of Reaction
Acid
Bases
Reaction with Metals
Acid + Metal → Salt + Hydrogen gas (H2)
E.g.,
Zn(s)+ dil. H2SO4 → ZnSO4 (Zinc Sulphate) + H2
Base + Metal → Salt + Hydrogen gas (H2)
E.g.,
2NaOH +Zn → Na2ZnO2 (Sodium zincate) + H2
Reaction with hydrogen carbonates (bicarbonate) and carbonates
Metal carbonate/Metal hydrogen carbonate + Acid → Salt + Carbon dioxide + Water
