1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Sample of titanium dioxide (TiO2)

  1. Oct 10, 2008 #1

    a.a

    User Avatar

    1. The problem statement, all variables and given/known data

    A sample of titanium dioxide (TiO2) weighing 1.598 g is heated in H2 gas to give
    water vapour and 1.438 g of another titanium oxide. What is the formula of the
    oxide produced?
    TiO2 (s) + H2 (g) TixOy (s) + H2O (g) (unbalanced)

    The solution posted is as follows but the main part i dont get is how the prof. found the number of moles Ti in TiO2
    Any help appericiated


    3. The attempt at a solution
    1.598 g TiO2 × 1 1 mol TiO2 × 1 mol Ti = 0.02001 mol Ti
    79.878 g TiO2 1 mol TiO2

    mol Ti in TiO2 = mol Ti in TixOy
    ∴mol Ti in TixOy = 0.02001
    mass of Ti in TixOy = 0.02001 mol Ti × 47.88 g Ti = 0.9579 g Ti
    1 mol Ti
    mass of O in TixOy = mass of sample – mass Ti
    mass of O in TixOy = 1.438 g – 0.9579 g = 0.4801 g O
    mol of O in TixOy = 0.4801 g O × 1 mol O = 0.03001 mol
    15.999 g O
    Thus we have a molar ratio of: Ti0.02001O0.03001
    Divide each number by the smallest value:
    Ti0.02001/0/02001O0.03001/0/02001 = Ti1O1.5 or, in whole numbers, Ti2O3.
     
  2. jcsd
  3. Oct 10, 2008 #2

    a.a

    User Avatar

    Re: Schiochemistry...

    oh wow.. i figured it out a different way.. wow.. soo suprised at my self

    what i did was first find the mass of Ti in the given mass if TiO2 rather than finding the monber of moles first.. i have a tendency of liking to stay in the quantity given to me.. it actually came inhandy here.. :)
     
    Last edited: Oct 10, 2008
  4. Oct 10, 2008 #3

    Borek

    User Avatar

    Staff: Mentor

    Re: Schiochemistry...

    1 mole of TiO2 is 79.87 g
    x moles is 1.598 g

    x = 1.598/79.87
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Sample of titanium dioxide (TiO2)
Loading...