Exam (elaborations)
Worksheet with answers
A level OCR A Chemistry Chapter 2 Determining Relative Atomic Masses questions&answers for practice
[Show more]
Seller
Follow
Content preview
2.2 Relative massOCR Chemistry A Follow up sheet
Determining the relative atomic mass
of a metal
Specification references
• 1.1.1 c) • 1.2.1 a) b) c) d) e)
• 1.1.2 b) • 1.2.2 a) k)
• 1.1.3 a) b) c) • 2.1.3 e) (i) (ii) f)
• 1.1.4 a) c) d)
Learning outcomes
After completing the worksheet you should be able to:
• carry out calculations using stoichiometric relationships
• determine the relative atomic mass of a metal by using experimental data
• evaluate different experimental methods to determine the relative atomic mass of
a metal.
Questions
1 a State what is meant by the term ‘relative atomic mass’. (1 mark)
b Use your periodic table to give the relative atomic mass of the following
metals: (3 marks)
• lithium (Li)
• magnesium (Mg)
• chromium (Cr)
• beryllium (Be)
• silver (Ag)
• potassium (K).
2 A student carried out an experiment to determine the relative atomic mass of
calcium. She added 0.40 g of calcium to 100 cm3 of distilled water and collected
the hydrogen formed. On completion of the reaction, she found she had
collected 202 cm3 of hydrogen.
a Construct an equation for this reaction. (1 mark)
b Calculate the number of moles of hydrogen formed. (1 mark)
c Calculate the relative atomic mass of the metal. Quote your answer to one
decimal place. (3 marks)
3 To check her results, the student decided to titrate the solution formed with
hydrochloric acid. She placed 25 cm3 of the solution into a conical flask and
added some phenolphthalein indicator. The solution required 24.20 cm3 of
0.2 mol dm-3 of hydrochloric acid for neutralisation.
© Oxford University Press 2015 www.oxfordsecondary.co.uk/acknowledgements
This resource sheet may have been changed from the original 1
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller fardinrahman. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £7.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
73918 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now