question 8 pls tell me
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%w/v=9.8%
taken quantity=10ml
mean that weight of H2SO4 in 10 ml = 0.98g
because 9.8g present in 100ml
then 1ml contain 9.8/100
so 10 ml has 9.8/100×10=0.98g
molarity=mole of solute/volume of solutions (ml)×1000
so mole of solute= mass/molar mass (molar mass of H2SO4=100)
0.98/100=mole
volume of solutions=10ml(H2SO4)+10ml(H2O)=20ml
molarity=0.98/100÷20×1000=0.49M
hope you like it
taken quantity=10ml
mean that weight of H2SO4 in 10 ml = 0.98g
because 9.8g present in 100ml
then 1ml contain 9.8/100
so 10 ml has 9.8/100×10=0.98g
molarity=mole of solute/volume of solutions (ml)×1000
so mole of solute= mass/molar mass (molar mass of H2SO4=100)
0.98/100=mole
volume of solutions=10ml(H2SO4)+10ml(H2O)=20ml
molarity=0.98/100÷20×1000=0.49M
hope you like it
anki37:
tnq so much....yaaa its true
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