A group 2 metal, M, is reacted with water so that M + 2H2O --> M(OH)2 + H2. 0.162g of metal produces 97.0cm3 of gas at RTP. Identify M.

1 mole of gas is produces for 1 mole of metal used.

n (moles) = volume/24000             ----   This is because 1 mole of a gas occupies 24000cm3 of space, so it's a simple ratio to work out moles(H2).

= 97/24000

= 0.004042 moles.

For group 2 metal, we want to work out the RFM, so we use:
 

RFM = grams/moles               ---  Rearranged from moles = grams/rfm

= 0.162/0.004042

= 40.1 gcm-3

This corresponds to calcium.

CS
Answered by Cory S. Chemistry tutor

14565 Views

See similar Chemistry A Level tutors

Related Chemistry A Level answers

All answers ▸

What is the difference between exothermic and endothermic?


What is the easiest way to calculate E cell values?


Give the IUPAC name of CH3CH2CH2CH2CH(OH)CN


Explain the relative resistance to bromination of benzene compared to phenol and compared to cyclohexene.


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