Class Work
9A Chemistry – The Last Post
Nov 22nd
For early finishers, I want you to look at different types of water treatment. Three main ways are below:
- Filtration
- Distillation
- Chlorination
For each type find the following answers to these questions:
- How does it work?
- What are the strengths of this water treatment process?
- What are the weaknesses of this water treatment process?
- Can you drink water if it’s only had this water treatment process? Explain.
Use the internet to help find your answers. Write your answers in your note book.
Grade 9 Chem Revision #2
Nov 14th
Our test is on Thursday 22nd of November 2012
Your study guide can be found HERE
Your Practice Test can be found HERE
Your Practice Test Answers are found HERE
Our Topics:
Reactivity Series
Metals & Reactivity (Page 66-67)
The Reactivity Series (Page 68-69)
PPT: HERE
The Mole & Balancing Equations
Acids Trio Experiments
Nov 1st
Today, we will be completing quite a few small experiments. They are:
(1) Comparing different liquids
9A Chem Small Experiments
Oct 12th
Today – we will be completing 3 small experiments/activities. They are:
- Balancing Equations Sheet (small prize for the fastest person to complete it first and there is also another small spot prize)
- Molar Concentrations Activity
- Finishing Distillation Experiment (finally!!!)
Instructions for Activities/Experiments
Molar Concentration Experiment
You will need: 3 test tubes, test tube rack, 2M HCl, 1M HCl, 0.1M HCl, 10mL pipette, 3 small pieces of Magnesium (Mg) which are close to same mass/size, stop watch/cell phone
Questions to be completed before experiment (in book with the question written down!!!)
Q1) What safety precautions will be need to take for this experiment? Why?
Q2) What results should we expect (predict) to see in this experiment? Why?
Q3) What do you think will happen if we keep on adding more Magnesium to the Hydrochloric acid? Will the reaction stay at the same speed, go faster or slower if we do not change the conditions (such as temperature, surface area etc)
Instructions
1) Put the three test tubes into the rack and fill each with 10mL of Hydrochloric Acid. One should have 2M, one should have 1M, one should have 0.1M. Label the strength on the test tube.
2) Cut and weigh three small pieces of Magnesium. You want them to be reasonably close in mass and size.
3) Get your stop watch ready and place a piece of Magnesium into each test tube at the same time. Record the time taken for each Hydrochloric Acid and Mg to fully react (when there is no more Magnesium metal). Stop after 10 minutes
4) Write down the time taken for each in a small table – then clean up and answer the questions below.
Questions
Q1) What happened in this experiment? Did the same happen compared to your prediction in Q2? Why?
Q2) Did the reaction seem to speed up, slow down or stay at the same speed throughout the reaction? Explain why
Distillation Experiment
I will show you how to do this. If we don’t finish it today – we will need to clean the experiment and put everything back…
Monday 20th of August – Intro to 9A Chem
Aug 19th
Dear 9A Students,
Welcome to 9A Chem.
Todays work can be downloaded from the following links:
PPT: http://yis9chem.wikispaces.com/file/detail/9A+Chem+Intro.pptx
Worksheet: http://yis9chem.wikispaces.com/file/detail/Periodic+Table+Worksheet+1.docx
Also don’t forget my Wiki: http://yis9chem.wikispaces.com
