C1 Exam Questions with Answers

These are the questions we've practised in class with answers at the end.


Lime Cycle Q&A.rtf 
(See lime cycle blog post for diagram and notes)

Percentage oxygen experiments Q&A.rtf

Titration calculations examples

Thanks to Uwais and Shahzaib for these!
Titration calculation example answers.pdf

Revision Resources

Click here for lots of chemistry revision resources.

Tests

A reminder for next week's tests:
11a1 - C1 test on Friday
11b1 - C1 test on Friday
11a2 - C2 test on Tuesday

Make sure you revise!

Well done to Sulayman for the best marks on the C1 test in 11a2 this week - 91% to beat!

The scale of the Universe

This is just quite cool.
http://htwins.net/scale/

Titration Calculations

Click here for titration practice questions
Always follow the steps:

STEP 1: Write out a balanced equation for the neutralisation reaction.

STEP 2: Determine the ‘mole ratio’ between acid and alkali using the balanced equation.

STEP 3: Split the page into 2 sections and write in all the values (n, c, v) you know:

              ACID                                                                                    ALKALI

· You should have 2 values of the known solution and only 1 value for the unknown solution

· Remember to convert any volumes from cm³ into dm³ by dividing by 1000

STEP 4: Use the ‘mole ratio’ to find the value for N of the unknown solution.

 STEP 5: Use the triangle to complete the calculation now that you know 2 values for the unknown solution.

Lime Cycle

See your revision guide for the symbol equations.
Sometimes you will see this as 3 steps rather than 4 (all the water is added at once so you go straight from calcium oxide to calcium hydroxide solution).
This is quite often linked to a question about mass in a reaction. Remember, the total mass of the reactants = the total mass of the products.
It's usually a simple addition or subtraction but may need you to explain your answer.
Explanation: No atoms are lost or made in a chemical reaction; mass is always conserved.

Revision app

Revise on the go with this free app  http://www.gojimo.co/
Make sure you select Edexcel exam board!