1.

To a 4 L of 0.2 M solution of NaOH, 2L of 0.5 M NaOH are added. The molarity of the resulting solution is :

Answer»

0.7 M
0.3 M
1.8 M
1.18 M

SOLUTION :Moles of NaOH in 4 L solution `=0.2xx4=0.8`
Moles of NaOH in 2 L solution `=0.5xx2=1.0`
Total moles `=1.0+0.8=1.8`
Total volume of solution `=4+2=6L`
MOLARITY `=(1.8)/(6)=0.3` M


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