100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
Group 2 UPDATED Exam Questions and CORRECT Answers £6.54
Add to cart
Quickly navigate to
Preview
  2.  
  3. Group 2
  4.  
  5. Group 2

Exam (elaborations)

Group 2 UPDATED Exam Questions and CORRECT Answers
 0 purchase
  • Module
  • Group 2
  • Institution
  • Group 2

Group 2 UPDATED Exam Questions and CORRECT Answers Use the Periodic Table to deduce the full electron configuration of calcium. - CORRECT ANSWER- 1s2 2s2 2p6 3s2 3p6 4s2 Write an ionic equation, with state symbols, to show the reaction of calcium with an excess of water. - CORRECT ANSWER- C...

[Show more]

Preview 2 out of 9  pages

Document information

  • August 25, 2024
  • 9
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • group 2
  • group

Written for

  • Group 2
  • Group 2

Seller

avatar-seller
MGRADES

Reviews received

Content preview

Group 2 UPDATED Exam Questions and
CORRECT Answers

Use the Periodic Table to deduce the full electron configuration of calcium. - CORRECT
ANSWER- 1s2 2s2 2p6 3s2 3p6 4s2


Write an ionic equation, with state symbols, to show the reaction of calcium with an excess of
water. - CORRECT ANSWER- Ca(s)+ 2H2O(l) → Ca2+(aq) + 2OH-(aq) + H2(g)


State the role of water in the reaction with calcium. - CORRECT ANSWER- Oxidising agent


Write an equation to show the process that occurs when the first ionisation energy of calcium
is measured. - CORRECT ANSWER- Ca(g) → Ca+(g) + e-


State and explain the trend in the first ionisation energies of the elements in Group 2 from
magnesium to barium. - CORRECT ANSWER- Decrease
Ions get bigger / more (energy) shells
Weaker attraction of ion to lost electron


Calcium hydroxide is slightly soluble in water at room temperature. As the temperature rises,
the solubility decreases. When the maximum amount of solid has dissolved at a particular
temperature the solution is said to be saturated.
In an experiment, the solubility of calcium hydroxide was measured over a range of
temperatures. The results are shown in the graph.
Use data from the graph to calculate the concentration, in mol dm−3, of a saturated solution
of calcium hydroxide at 30 °C. Give your answer to 3 significant figures.
Show your working. - CORRECT ANSWER- 0.155 g per 100 cm3
(0..1) × 10 = 0.0209 mol dm−3


You are given a sample of saturated calcium hydroxide solution. Outline the practical steps
that you would take to determine the solubility of calcium hydroxide in
this solution. - CORRECT ANSWER- Take a known volume of the saturated solution
Evaporate the filtrate to dryness

, Weigh the residue of known concentration


Zinc is similar to Group 2 metals and forms compounds containing Zn2+ ions.
Write an equation for the thermal decomposition of zinc carbonate to zinc oxide.
Calculate the percentage atom economy for the formation of zinc oxide from zinc
carbonate in this reaction. - CORRECT ANSWER- ZnCO3 → ZnO + CO2
Percentage atom economy =
81..4
x 100
= 64.9


A laboratory technician discovered four badly−labelled bottles, each containing one pure
white solid. Each bottle contained a compound of a different Group 2 metal (magnesium,
calcium, strontium and barium).
Some tests were carried out on the solids or, if the compound was soluble, on the aqueous
solution. The results are given in the table.
One of the bottles has a very faint label that could be read as 'Magnesium Sulfate'.
Use the information in the table to deduce which one of the four compounds is magnesium
sulfate and explain your answer. - CORRECT ANSWER- Compound 1
No visible change with H2SO4
Gives white precipitate with NaOH


The bottle containing Compound 2 has a 'TOXIC' hazard symbol.
Use the information in the table to identify Compound 2.
Explain both observations in the reaction with H2SO4(aq). - CORRECT ANSWER- BaCO3
The carbonate ion releases CO2 but the BaSO4 formed is highly insoluble.


Identify the compound that is strontium hydroxide.
Give an equation for the reaction of strontium hydroxide with sulfuric acid. - CORRECT
ANSWER- Compound 4
Sr(OH)2 + H2SO4 → SrSO4 + 2H2O

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

Quick and easy check-out

You can quickly pay through credit card for the summaries. There is no membership needed.

Focus on what matters

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 MGRADES. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for £6.54. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

68175 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy revision notes and other study material for 15 years now

Start selling
£6.54
  • (0)
Add to cart
Added