Which of the following molarity values of ions in a aqueous solution of 5.85 % w / v NaCl , 5.55 % w / v CaCl 2 and 6 % w / v NaOH are correct [ Na =23, Cl =35.5 Ca =40=16]

Question

Which of the following molarity values of ions in a aqueous solution of 5.85 % w / v NaCl , 5.55 % w / v CaCl 2 and 6 % w / v NaOH are correct [ Na =23, Cl =35.5 Ca =40=16] (A) [ Cl -1]=2 M (B) [ OH -]=1.5 M (C) [ Ca 2+]=0.5 M (D) All of these

Tardigrade Admin · Accepted Answer

Only single solution have all these

Means

100 m l

solution have

5.85 g m N a Cl = 0.1

mole

and

5.55 g m C a C l_{2} = 0.05

mole

[C l^{-}] = \frac{( 0.1 + 0.05 \times 2 ) \times 1000}{100} = 2 M

\Rightarrow [N a^{+}] = \frac{( 0.1 + 0.15 ) \times 1000}{100} = 2.5 M

[C a^{2 +}] = \frac{0.05}{100} \times 1000 = 0.5 M

\Rightarrow [O H^{-}] = 1.5 M

Q. Which of the following molarity values of ions in a aqueous solution of $5.85% w / v N a Cl, 5.55 % w / v C a C l_{2}$ and $6% w / v N a O H$ are correct $[N a = 23, Cl = 35.5$ $C a = 40 = 16]$

$[C l^{- 1}] = 2 M$

$[O H^{-}] = 1.5 M$

$[C a^{2 +}] = 0.5 M$

All of these

Q. Which of the following molarity values of ions in a aqueous solution of 5.85%w/vNaCl,5.55%w/vCaCl2​ and 6%w/vNaOH are correct [Na=23,Cl=35.5 Ca=40=16]

[Cl−1]=2M

[OH−]=1.5M

[Ca2+]=0.5M

All of these

Only single solution have all these Means 100ml solution have 5.85gmNaCl=0.1 mole and 5.55gmCaCl2​=0.05 mole [Cl−]=100(0.1+0.05×2)×1000​=2M ⇒[Na+]=100(0.1+0.15)×1000​=2.5M [Ca2+]=1000.05​×1000=0.5M ⇒[OH−]=1.5M

Q. Which of the following molarity values of ions in a aqueous solution of $5.85% w / v N a Cl, 5.55 % w / v C a C l_{2}$ and $6% w / v N a O H$ are correct $[N a = 23, Cl = 35.5$ $C a = 40 = 16]$

$[C l^{- 1}] = 2 M$

$[O H^{-}] = 1.5 M$

$[C a^{2 +}] = 0.5 M$