Turn on thread page Beta
    • Thread Starter
    Offline

    0
    ReputationRep:
    help me out i know no conversions or calculations neither do i know dilutions explain to me this and more or how i can learn more please got a test


    8 mL of NaCl solution are added to 40 mL of distilled water and then an
    additional 20 mL of NaOH solution are added. By how many times has the
    original NaCl solution been diluted?
    a) 8.5
    b) 8
    c) 5.8
    d) 0.1
    e) 6
    Offline

    9
    ReputationRep:
    (Original post by azz92)
    help me out i know no conversions or calculations neither do i know dilutions explain to me this and more or how i can learn more please got a test


    8 mL of NaCl solution are added to 40 mL of distilled water and then an
    additional 20 mL of NaOH solution are added. By how many times has the
    original NaCl solution been diluted?
    a) 8.5
    b) 8
    c) 5.8
    d) 0.1
    e) 6
    You start with 8ml of solution. You then add 40ml of water and another 20ml of another solution. So you end up with 8ml + 40ml + 20ml = 68ml

    So your original solution has been diluted by 68/8 times = 8.5 times.

    Simple

    MP
    Offline

    20
    ReputationRep:
    (Original post by MaturePharm)
    You start with 8ml of solution. You then add 40ml of water and another 20ml of another solution. So you end up with 8ml + 40ml + 20ml = 68ml

    So your original solution has been diluted by 68/8 times = 8.5 times.

    Simple

    MP
    oh of course... that's embarassing...

    I'll delete my post now... :getmecoat:
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: December 5, 2011

University open days

  • Sheffield Hallam University
    City Campus Postgraduate
    Wed, 17 Oct '18
  • Staffordshire University
    Nursing and Midwifery Undergraduate
    Wed, 17 Oct '18
  • Teesside University
    Undergraduate open day Undergraduate
    Wed, 17 Oct '18
Poll
Who is most responsible for your success at university

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.