Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 5

MEDIUM

11th CBSE

IMPORTANT

Earn 100

How many grams of barium chloride ( ${BaCl}_{2}$ ) are needed to prepare $100 {cm}^{3}$ of $0.250 M$ ${BaCl}_{2}$ solution?

Note: the question is given as it is in the book.

Important Questions on Some Basic Concepts of Chemistry

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 6

How many moles and how many grams of sodium chloride (

NaCl

) are present in

250 mL

of a

0.50 M

NaCl

solution?

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 7

A sample of

{NaNO}_{3}

weighing

0.38 g

is placed in a

50.0 mL

measuring flask. The flask is then filled with water up to the mark on the neck. What is the molarity of the solution?

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 8

In a reaction vessel,

0.184 g

of

NaOH

is required to be added for completing the reaction. How many millilitres of

0.150 M NaOH

solution should be added for this requirement?

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 1

Molarity of

H_{2} {SO}_{4}

is

0.8

and its density is

1.06 g {cm}^{- 3}

. What will be its concentration in terms of molality and mole fraction?

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 2

The concentration of

H_{2} {SO}_{4}

in a bottle labelled “conc. Sulphuric acid” is

18 M

. The solution has a density of

1.84 g {cm}^{- 3}

. What is the mole fraction and weight percentage of sulphuric acid in this solution?

EASY

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 3

Calculate the molality of

1

litre solution of

93 %

H_{2} {SO}_{4}

(weight/volume). The density of the solution is

1.84 g {mL}^{- 1}

.

EASY

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 4

Calculate the mole fraction of ethanol and water in a sample of rectified spirit which contains

95

per cent of ethanol by weight.

EASY

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 5

The density of a

3 M {Na}_{2} S_{2} O_{3}

(sodium thiosulphate) solution is

1.25 g {cm}^{- 3}

. Calculate the percentage by weight of sodium thiosulphate.