12. Compare mass of pure NaOti in .each o' theaqueous solution(i) 50 g

1.	12. Compare mass of pure NaOti in .each o' theaqueous solution(i) 50 g of 40% (w/w) NaOH(ii) 50 mL of 50% (w/v) NaOH/d、i':1.2 g/mL]i) = (ii)(4) Mass in () is double the mass in(i)
Answer» 50g of 40% (w/w) means, if total weight of solution is 50g then mass of NaoH = 40% of 50 = 20g and 50ml of 50%(w/v) means in 50 ml of solution , 50% by mass is NaoH so, mass of 50ml solution is = 50(d) = 501.2 = 60g then % mass of NaOH = 50% of 60 = 30g so, 2> 1 option 1

12. Compare mass of pure NaOti in .each o' theaqueous solution(i) 50 g of 40% (w/w) NaOH(ii) 50 mL of 50% (w/v) NaOH/d、i':1.2 g/mL]i) = (ii)(4) Mass in () is double the mass in(i)

Answer»

50g of 40% (w/w) means, if total weight of solution is 50g

then mass of NaoH = 40% of 50 = 20g

and 50ml of 50%(w/v) means in 50 ml of solution , 50% by mass is NaoH

so, mass of 50ml solution is = 50*(d) = 50*1.2 = 60g

then % mass of NaOH = 50% of 60 = 30g

so, 2> 1

option 1