Home
Class 11
CHEMISTRY
Calculate the mass of CaO required to re...

Calculate the mass of CaO required to remove the hardness of 1000,000 litres of water containing 1.62 g of calcium bicarbonate per litre.

Text Solution

Verified by Experts

The reaction is:
`underset(1 mol)(CaO) + underset(1 mol)(Ca (HCO_(3))_(2) rarr underset(2 mol)(2CaCO_(3)) + H_(2) O`
Moles of `Ca(HCO_(3))_(2)` in `1.0 L` of sample `= (1.62)/(162) = 0.01 mol`
Moles of `CaO` required in `1.0 L` of sample `= 0.1 mol L^(-1)`
Mole of `CaO` requried in `10^(6) L` of sample
`= 0.01 xx 10^(6) mol//10^(6) L = 10^(4) mol (10^(6) L)^(-1)`
Weight of `CaO = 10^(4) xx 56 = 5.6 xx 10^(5) g`
Promotional Banner

Topper's Solved these Questions

  • SOME BASIC CONCEPTS AND MOLE CONCEPT

    CENGAGE CHEMISTRY ENGLISH|Exercise Ex 1.1 Objective Questions|6 Videos

  • SOME BASIC CONCEPTS AND MOLE CONCEPT

    CENGAGE CHEMISTRY ENGLISH|Exercise Ex 1.1 Objective Questions (Single Correct)|3 Videos

  • S-BLOCK GROUP 2 - ALKALINE EARTH METALS

    CENGAGE CHEMISTRY ENGLISH|Exercise Ex 5.1 Objective|2 Videos

  • STATES OF MATTER

    CENGAGE CHEMISTRY ENGLISH|Exercise Exercises (Ture False)|25 Videos

Similar Questions

Explore conceptually related problems

Mass of CaO will be required to remove the hardness of 1000 litres of water containing 1.62 g of calcium bicarbonate per litre is A. Find value of A

What is the amount of lime Ca(OH) 2 ​ required to remove the hardness in 60 litres of pond water containing 1.62 mg of calcium bicarbonate per 100 mL of water?

Calculate the mass of sodium sulphate required to prepare its 20% (mass per cent) solution in 100 g of water?

Calculate milli equilvalent of washing soda required to remove its hardness from one litre hard water contains "18.00 mg Mg"^(2+)

The osmotic pressure of a solution containing 0.1 mol of solute per litre at 300 K is

The osmotic pressure of a solution containing 0.1 mol of solute per litre at 273 K is

The osmotic pressure of a solution containing 0.1 mol of solute per litre at 323 K is

The temporary hardness of water due to calcium bicarbonate can be removed by adding

Calculate the pH of a solution : containing 20 gm of NaOH per litre water