Home
Class 12
CHEMISTRY
On hearing 200 g CaCO(3), CaO is obtaine...

On hearing `200 g CaCO_(3), CaO` is obtained which will react with how much gram of water to obtain `Ca(OH)_(2)`?

A

200 g

B

112 g

C

36 g

D

40 g

Text Solution

Verified by Experts

The correct Answer is:
A
`{:(Ca CO _(3) overset("Heat") to CaO + CO _(2) ) , (40 + 12 + 48 " "40 + 16 ),(=100 " "= 56):}`
`because 100 g Ca CO _(3)` gives `= 56 g CaO `
`therefore 200 g Ca CO _(3) ` gives `= ( 56 xx 200)/(100) = 112 g`
`underset(40+ 16 = 56) (CaO) + underset( 2 + 16 = 18) ( H _(2)O ) to Ca (OH) _(2)`
`because 56 g CaO` reacts with water = 18 g
`therefore 112 g CaO` reacts with water
` = (18 xx 112)/(56) = 36 g`
Promotional Banner

Similar Questions

Explore conceptually related problems

On heating 200 g CaCO_(3) , CaO is obtained which will react with how much gram of water to obtain Ca(OH)_(2) ?

By heating 10 g CaCO_(3), 5.6 g CaO is formed. What is the weight of CO_(2) obtained in this reaction

100 g CaCO_(3) reacts with 1 litre 1 N HCl . On completion of reaction how much weight of CO_(2) will be obtain

50 g of CaCO_(3) is allowed to react with 70 g of H_(3)PO_(4^(.) Calculate : (i) amount of Ca_(3)(PO_(4))_(2) formed (ii) amount of unreacted reagent

A water is said to be soft water if it produces sufficient foam with the soap and water that does not produce foam with soap is known as hard water. Hardness has been classified into two types (i)Temporary hardness (ii) Permanent hardness. Temporary hardness is due to presence of calcium and magnesium bicarbonate. It is simply removed by boiling as Ca(HCO_(3))_(2)overset(Delta)rarr CaCO_(3)darr+CO_(2)uarr+H_(2)O Mg(HCO_(3))_(2)overset(Delta)rarr MgCO_(3)darr+CO_(2)uarr+H_(2)O temporary hardness can also be removed by addition of slaked lime, Ca(OH)_(2) Ca(HCO_(3))_(2)+Ca(OH)_(2) to 2CaCO_(3)darr+2H_(2)O permanent hardsness is due to presencce of sulphates and chlorides of Ca,Mg,etc. It is removed by washing soda as CaCl_(2)+Na_(2)CO_(3) to CaCO_(3)darr+2NaCl CaSO(4)+Na_(2)CO_(3)to CaCO_(3)darr+Na_(2)SO_(4) Permanent hardness also removed by ion exchange resin process as 2RH+Ca^(2+)toR_(2)Ca+2H^(+) 2ROH+SO_(4)^(2-) to R_(2)SO_(4)+2OH^(-) The degree of hardness of water is measured in terms of PPm of CaCO_(3) 100 PPm means 100 g of CaCO_(3) is present in 10^(6) g of H_(2)O . If any other water sample which contain 120 PPm of MgSO_(4) , hardness in terms of CaCO_(3) is equal to =100 PPm. One litre of a sample of hard water (d=1 g/mL) cotains 136 mg of CaSO_(4) and 190 mg of MgCl_(2) . What is the total hardness of water in terms of CaCO_(3) ?

What is the amount of heat to be supplied to prepare 128g of CaCO_(3) by using CaCO_(3) and followed by reduction with carbon, Reactions are CaCO_(3)(s)=CaO(s)+CO_(2)(g),DeltaH^(@)=42.8Kcal CaCO(s)=3C(s)=CaC_(2)+CO(g),DeltaH^(@)=111Kcal

The volume of CO_(2) at STP obtained by heating 1 g of CaCO_(3) will be