1.

100 ml of 0.1 M solutionA is mixed with 20ml of 0.2 M solution B. The final molarity of the solution is :

Answer»

0.12 M
0.15 M
0.18 M
0.21 M

Solution :Moles of A in 100 ML `=(0.1xx100)/(1000)=0.01`
Moles of B in 20 ml `=(0.2xx20)/(1000)=0.004`
Total moles `= 0.01+0.004=0.014`
Molarity `= (0.014)/(120)xx1000=0.117=0.12` M


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