Home
Class 12
CHEMISTRY
How much ethyl alcohol must be added to ...

How much ethyl alcohol must be added to 1 litre of water so that the solution will freeze at `- 14^@C` ? (Kf for water = `1.86^@C`/mol)

A

7.5 mol

B

8.5 mol

C

9.5 mol

D

10.5 mol

Text Solution

Verified by Experts

The correct Answer is:
A
`Delta T_(f) = K_(f)m`
`Delta T_(f) = K_(f) (n_(2) xx 1000)/(W_(1))`
`14 = 1.86 xx (n_(2) xx 1000)/(1000)`
`n_(2) = 7.5` mol
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • SAMPLE PAPER 01

    EDUCART PUBLICATION|Exercise SECTION-C|5 Videos

  • SAMPLE PAPER 01

    EDUCART PUBLICATION|Exercise SECTION-C|5 Videos

  • SAMPLE PAPER 02

    EDUCART PUBLICATION|Exercise SECTION - C|6 Videos

Similar Questions

Explore conceptually related problems

How many ethyl alcohol must be added to 1.00 L of water so that the solution will not freeze at -4^(@)F ?

How much ethly alcohol much be added ot 1.0 litre of water so that the solution may treeze at -10^(@)C. (K_(f) "for water =1.88 K kg" mol^(-1), "density of water=1 g "mL^(-1)).

Knowledge Check

  • How much ethyl alcohol C_2H_5OH , must be added to 1.00 L of water so that the solution will not freeze at -4^0F ?

    A
    211g
    B
    495 g
    C
    85 g
    D
    46 g

  • How much ethyl alcohol C_2H_5OH , must be added to 1.00 L of water so that the solution will not freeze at -4^0F ?

    A
    211g
    B
    495 g
    C
    85 g
    D
    46 g

  • The weight of ethyl alcohol which must be added to 1.0 L of water so that the solution will freeze at 14^@F is (K_f of water = 1.86 K kg mol^(-1) )

    A
    263.11 g
    B
    247.31 g
    C
    236.11 g
    D
    281.01 g

    • Similar Questions

    Explore conceptually related problems

    How much ethyl alcohol must be added to 1.0L of water so that solution will not freeze at -4^@F ? ( K_f = 1.86^@C//m )

    How much amount of KCl must be added to 1 kg of water so that the freezing point is depressed by 2 K? (K_f "for water" = 1.86 kg mol^(-1))

    How maby grams of methyl alcohol should be added to 10 litre tank of water to prevent its freezing at 268K ? (K_(f) for water is 1.86 K kg mol^(-1))

    How many grams of methyl alcohol should be added to I 0 litre tank of water to prevent its freezing at 268 K ? (K _(f) for water is 1.86 K k g mol ^(-1))

    How many grams of KCI should be added to 1000 g of water , so that the freezing point reduces to - 10^(@)C? (K_(f) "for water "=1.86""^(@)C kg mol ^(-1))

    Home
    Profile