Question #eebf3

1 Answer
May 15, 2016

Answer:

#0.179# #M#

Explanation:

The way to find this is given by the formula #M_1V_1 = M_2V_2# for titrations

Therefore, the sulfuric acid is #0.3# #M# and #25# #mL# as Volume
i.e. #M_1 = 0.3# #M#, #V_1 = 25# #ml#; #V_2 = 42# #ml#; #M_2 =?#

#0.3 xx 25 = 42 * x#
where #x# is the molarity of sodium hydroxide

#7.5 = 42x#

#x = 0.17857# #M#