Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    0
    ReputationRep:
    If given the formula to find V1, why are the numbers on the right hand side divided by that on the left (1000) and not the other way around? I really struggle rearranging equations for some reason, I just need a simple way of remembering

    C1V1 = C2V2

    1000 x V1 = 20 x 200
    V1 = 20 x 200/1000
    V1 = 4000/1000
    V1 = 4µl
    • Study Helper
    Offline

    13
    (Original post by mimajones)
    If given the formula to find V1, why are the numbers on the right hand side divided by that on the left (1000) and not the other way around? I really struggle rearranging equations for some reason, I just need a simple way of remembering

    C1V1 = C2V2

    1000 x V1 = 20 x 200
    V1 = 20 x 200/1000
    V1 = 4000/1000
    V1 = 4µl
    Since you've looking for the value of V1, you want to isolate it on one side of the equation. So, get rid of the 1000 on the left, by dividing the whole equation through by 1000,
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by ghostwalker)
    Since you've looking for the value of V1, you want to isolate it on one side of the equation. So, get rid of the 1000 on the left, by dividing the whole equation through by 1000,
    Thank you!
    It seems so simple now, I just couldn't get my head around it.
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    What newspaper do you read/prefer?
    Useful resources

    Make your revision easier

    Maths

    Maths Forum posting guidelines

    Not sure where to post? Read the updated guidelines here

    Equations

    How to use LaTex

    Writing equations the easy way

    Student revising

    Study habits of A* students

    Top tips from students who have already aced their exams

    Study Planner

    Create your own Study Planner

    Never miss a deadline again

    Polling station sign

    Thinking about a maths degree?

    Chat with other maths applicants

    Can you help? Study help unanswered threads

    Groups associated with this forum:

    View associated groups
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • 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

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