What mass of sodium hydroxide would need to be dissolved to make 100 cm^3 of a 0.5 mol dm^-3 solution? (3 marks)

Number of moles = (0.5 x 100)/1000 = 0.05 moles (1 mark)Molar mass, M, of NaOH = 23 + 16 + 1 = 40 (1 mark)Mass of NaOH needed = moles x M = 0.05 x 40 = 2g (1 mark)correct answer alone scores 3 markscorrect formula for working out moles or mass = 1 mark

AA
Answered by Aarif A. Chemistry tutor

7478 Views

See similar Chemistry GCSE tutors

Related Chemistry GCSE answers

All answers ▸

Why is water less dense in its solid state?


Explain how a covalent bond holds two atoms together.


Calculate the mass of copper oxide required to produce 24.95 g of copper sulfate crystals (CuSO4.5H2O).


25cm3 NaOH was titrated with 0.05mol dm-3 HCl. 21.5m3 of HCl neutralised 25cm3 of NaOH. What is the concentration of NaOH in mol dm-3?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences