The volume of ethyl alcohol (density 1.1...

The volume of ethyl alcohol (density 1.15 g/cc) that has to be added to prepare 100 cc of 0.5 M ethyl alcohol solution in water is

1.15 cc

2 cc

2.15 cc

2.30 cc

Text Solution

Verified by Experts

The correct Answer is:

100 cc of 0.5 M ethyl alcohol
`-= 100 xx 0.5 xx 10^(-3)` mole `=5 xx 10^(-2)` mole
`therefore` Weight of ethyl alcohol required
`=5 xx 10^(-2) xx 46 g = 2.3 g` [`therefore` Molecular weight of ethyl alcohol = 46]
`therefore d=("Mass")/("Volume") rArr 1.15 = 2.3/V rArr V = 2.30/1.15` =2
`therefore` Volume required =2cc

Topper's Solved these Questions

ATOMS MOLECULES AND CHEMICAL ARITHEMETIC
MTG-WBJEE|Exercise WB JEE PREVIOUS YEARS QUESTIONS (CATEGORY 1: SINGLE OPTION CORRECT TYPE (1 MARK))|8 Videos
ATOMIC STRUCTURE
MTG-WBJEE|Exercise WB JEE Previous Years Questions (CATEGORY 2 : Single Option Correct Type (2 Marks)|1 Videos
CHEMICAL BONDING AND MOLECULAR STRUCTURE
MTG-WBJEE|Exercise WB JEE Previous Years Questons (Category 2 : One or More than one Option Correct Type )|3 Videos

The amount of water to be added to 100 c.c. of 1 normal HCl solution to make it decinormal is -

900 c.c.

850 c.c.

400 c.c.

600 c.c.

Brine has a density of 1.2 g/cc. 40 cc of it are mixed with 30 cc of water. The density of solution is

2.11 g/cc

1.11g/cc

12.2g/cc

20.4g/cc

What volume of 75% alcohol by mass (d=0.8 g/ cm^(3) ) must be used to prepare 150cc. Of 30% alcohol by mass (d=0.9g//cm^(3)) ?

44.44mL

56.25mL

67.5mL

33.56mL