Trusted by millions of Kenyans
Study resources on Kenyaplex

Get ready-made curriculum aligned revision materials

Exam papers, notes, holiday assignments and topical questions – all aligned to the Kenyan curriculum.

In an experiment it was found that 40.0cm3 of 0.2M sodium hydroxide solution just neutralized 0.2g of a dibasic acid Q..

In an experiment it was found that 40.0cm3 of 0.2M sodium hydroxide solution just neutralized 0.2g of a dibasic acid Q. Calculate the relative molecular mass of acid Q.

Answers


Samuel
2NaOH + H2X Na2X(aq) + H2O(l)
Mole ratio 2 : 1
100cm3 of NaOH contained 0.2 moles
? No. of moles of a dibasic acid and reacting 0.008 x ½ = 0.004 moles
0.004 moles weigh 0.2g
? 1 mole will weigh (0.2)/(0.004)
= 50g

(0.2)/RMM=0.004

? RM = (0.2)/(0.004) = 50g

Lywascomputers answered the question on August 19, 2018 at 18:16

Answer Attachments

Exams With Marking Schemes

Related Questions