31.8k views
3 votes
When 100 cm3 of a saturated solution of KClO3 at 40°C is evaporated, 14.0g of the salt is recovered. What is the solubility of KClO3 at 40°C

User Splatto
by
4.9k points

1 Answer

6 votes

Step-by-step explanation:

kclo3- 39+35.5+16*3=122.5

molar mass = 122.5

mass = 14.0g

volume= 100cm3

solubility in mol/dm3 or molarity = ?

but we know that

no of moles = solubility in mol/dm3×vol in cm3

---------------------------------------------

1000

no of moles = mass

---------

molar mass

mass\molar mass= solubility in mol/dm3 *vol in cm3/ 1000

14.0/122.5=x * 100/1000

solubility =0.875 mol/dm3

User Pronskiy
by
5.1k points