Question

21)
TUJU.23 V
2 molal NaOH solution has temperature 298 K. if temperature of the solution is 323 K. concentration
will be
(a) 2m
(b) 4 m
(c) 3 m
(d) 0.2 m​

Answer 1

QUESTION :

• 2 molal NaOH solution has temperature 298 K. if temperature of the solution is 323 K. concentration

GIVEN :

• Molality (m 1 ) = 2 m
• Temperature (T 1 ) = 298 K
• Temperature ( T 2 ) = 323 K

SOLUTION :

As per the formula ,

molality = moles of solute / mass of the solvent

mass doesn't depend upon temperature

hence ,molality also doesn't depend upon temperature

hence , at 323 K the molality remains the same

molality ( m 2 ) = 2 m

ANSWER :

• molality = 2 m