Turn on thread page Beta
    • Thread Starter
    Offline

    1
    ReputationRep:
    2PbO+C=2Pb+CO2 what mass of carbon would be required to react fully with 22.3g of lead (II) oxide?
    • Community Assistant
    • Study Helper
    Offline

    17
    ReputationRep:
    Community Assistant
    Study Helper
    (Original post by jackiemcnair)
    2PbO+C=2Pb+CO2 what mass of carbon would be required to react fully with 22.3g of lead (II) oxide?
    mass lead oxide =====> mol lead oxide (mol = mass/Mr)

    mol lead oxide =====> mol carbon (coefficient ratios in the balanced equation)

    mol carbon =====> mass carbon (mass = mol x Ar)
    Offline

    17
    ReputationRep:
    (Original post by jackiemcnair)
    2PbO+C=2Pb+CO2 what mass of carbon would be required to react fully with 22.3g of lead (II) oxide?
    I did higher chemistry last year so I think I can help:

    They key to doing this type of question is using your GFM ratios. You can see from the equation that for every 1 mole of carbon there is 2 moles of lead oxide. Ratio is 1:2. After concluding the ratio think about the gfm of each compound. The gfm of carbon is 12 grams and the gfm of lead oxide is 223.2 grams but there is 2 of them in the reaction ratio so 446.4 grams. So for every 12 grams of carbon there is 446.4 grams of lead oxide. Just simply divide the mass of lead oxide by 446.4 to find how much mass of carbon there is per 1 g of lead and then times the 1 g of lead oxide by 22.3 to find how much mass of carbon there is per 22.3 grams of lead oxide.


    Posted from TSR Mobile
    • Thread Starter
    Offline

    1
    ReputationRep:
    (Original post by RossB1702)
    I did higher chemistry last year so I think I can help:

    They key to doing this type of question is using your GFM ratios. You can see from the equation that for every 1 mole of carbon there is 2 moles of lead oxide. Ratio is 1:2. After concluding the ratio think about the gfm of each compound. The gfm of carbon is 12 grams and the gfm of lead oxide is 223.2 grams but there is 2 of them in the reaction ratio so 446.4 grams. So for every 12 grams of carbon there is 446.4 grams of lead oxide. Just simply divide the mass of lead oxide by 446.4 to find how much mass of carbon there is per 1 g of lead and then times the 1 g of lead oxide by 22.3 to find how much mass of carbon there is per 22.3 grams of lead oxide.


    Posted from TSR Mobile
    thank you
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: October 29, 2016
The home of Results and Clearing

1,075

people online now

1,567,000

students helped last year

University open days

  1. Sheffield Hallam University
    City Campus Undergraduate
    Tue, 21 Aug '18
  2. Bournemouth University
    Clearing Open Day Undergraduate
    Wed, 22 Aug '18
  3. University of Buckingham
    Postgraduate Open Evening Postgraduate
    Thu, 23 Aug '18
Poll
A-level students - how do you feel about your results?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.