$N a O H (a q .)$ , $H C l (a q)$ and $N a C l (a q .)$ have concentration of $10^{- 3} M$ each. Their pH will be respectively:

10, 6, 2

No worries! We‘ve got your back. Try BYJU‘S free classes today!

11, 3, 7

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

10, 3, 7

No worries! We‘ve got your back. Try BYJU‘S free classes today!

10, 4, 7

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B $11, 3, 7$
$H C l$ is strong acid so it dissociates completely to give $[H^{+}]$ ions whose concentration is $10^{- 3} M$ .
As we know $p H = - l o g ([H^{+}]) = 3$
$N a O H$ is strong base so it dissociates completely to give $[O H^{-}]$ ions whose concentration is $10^{- 3} M$ .
As we know $p O H = - l o g ([O H^{-}]) = 3$
We also know that $p H + p O H = 14$ so $p H = 11$
$N a C l$ is salt os strong acid and strong base so it is neutral in nature so its $p H = 7.$

Suggest Corrections

Similar questions

NaOH (aq) + HCl (aq) \to NaCl (aq) + H_{2} O (l)

Δ H \neq Δ U

N a O H (a q) + H C l (a q) ⟶ N a C l (a q) + H_{2} O (l)

B a (O H)_{2} + H_{2} S O_{4} (a q) ⟶ B a S O_{4} (s) + 2 H_{2} O (l)

1.00 m o l L^{- 1}

200 m L

2.00 m o l L^{- 1}

N a O H (a q .) + H C l (a q .) \to N a C l (a q .) + H_{2} O (l) .

Complete and balance the following chemical equations :

(a) $Z n (s) + H C l (a q) \to$

(b) $N a_{2} C O_{3} (s) + H C l (a q) \to$

(d) $N a O H (a q) + H C l (a q) \to$

(e) $C u O (s) + H C l (a q) \to$

Join BYJU'S Learning Program