Monthly Archives: November 2015

Stoichiometry II


  1. Define the following:
  • solute
  • solvent
  • solution
  • concentration
  • dilute
  • concentrated
  1. Create a labelled diagram(s) to illustrate these six terms and upload it to the Google+ in the category 1 Stoichiometry.

Problems and Mixtures

Screen Shot 2015-11-16 at 11.38.31 AM


  1. Have a read through these worked examples on molarity (working out concentrations of solutions).
  2. Go back to the Google+ and look at the diagrams other people posted.  Click the +1 button for the one you like the best and put in the comment what you like about it.
  3. Now try some of the problems here yourself.
  4. What is the difference between a homogenous and a heterogenous mixture? With a partner, agree on the answer to this question.  Then record a video of your agreed explanation (no longer than 30 secs) and upload it to the Google+ community under the subject 1 Stoichiometry.

Limiting Reagent

Refresh your memory about how reactants and products in a chemical equation are related to each other by playing this game from last lesson.

  1. Define the following:
    Limiting Reagent
    Excess Reagent
  2. Take a look at the videos posted on the Google+ and put a +1 for the one you think is the best for clarity of explanation and visual appeal!

Stoichiometry I

cc licensed ( BY NC SA ) flickr photo shared by Mick Talbot

Start at the beginning and work through.  If you feel confident, then move on to the next type of problem.  If you don’t get them, SEEK HELP immediately from a classmate or me!  😛

1.  Balancing equations – Here you will find 4 different worksheets with practise questions on them.  The answers are also there.  Practise until you feel more confident.  Still stuck?  Want more practice?  Try this simulation below.

2.  Avagadro’s number problems –

Here you will get a section explaining how to convert between moles and number of particles.  Then there are some problems to try.  You can find the page here.

3.  Moles to mass problems – Here you will find a few calculations to practise with the answers.  You can find it here.

4.  Stoichiometric relationships in equations!   Play with the simulation below!  You must make it through all 3 levels of the game with 100% correct before moving on to the next section.

5.  For more problems, tutorials and general help with the mole, you can use this useful site here.  This Crash Course video below is a 12 minute summary of Stoichiometry!

Grade 7C Period 4

Hello grade 7!

I know this is supposed to be tutor period but we are going to use it for Science today!  I would like you to work on the Investigating Atoms activity.  It is on the google classroom for Science.  Some of you started it before break.  AB got quite far with it so if you have any problems she can help you.

If you finish early, you can log in to BrainPop and choose some video on atoms to watch.

Have a good weekend and see you on Monday!