Ionic Compounds and Insoluble Salts

?

1. Name all of the insoluble substances (including exceptions)

  • sodium, potassium and ammonium carbonates and hydroxides
  • chlorides, sulfates, nitrates and salts of sodium, potassium and ammonium
  • Silver and lead chlorides, lead, barium and calcium sulfates and carbonates and hydroxides
  • nitrates, sulfates and salts
1 of 10

Other questions in this quiz

2. Why is barium used in x-rays?

  • Barium sulfate is opaque to x-rays so it can be used to show problems in the gut. It is toxic but can be safely drunk because it's insoluble.
  • It is transparent so allows the bones to be more visible, and it is soluble, meaning that it absorbs into your blood and leaves no toxic waste behind,
  • It contains reactive ions that react with the x-rays, causing the reaction zones to show up in your body over areas of abnormality
  • Because it is insoluble so clumps in areas of broken bones.

3. What is the test for chlorides?

  • Add dilute hydrochloric acid and barium chloride to the solution. If a white precipitate of barium chloride forms, the original was a chloride
  • Add dilute nitric acid and silver nitrate solution and if a white precipitate of silver chloride forms, the original was a chloride.
  • Add citric acid and lead chloride solution and if it changes colour from clear to red it was a chloride
  • dd chlorine and water and if it begans to smoke and fizz it was a chloride

4. What colours do calcium and copper metals create during a flame test?

  • calcium = red and copper = blue/green
  • calcium = blue/green and copper = red
  • calcium = purple and copper = red
  • calcium = orange and copper = pruple

5. What is spectroscopy and why is it used?

  • This is the correct term for a flame test and they are used to find out what element/elements a substance contains.
  • It is when a gaenocologists takes a look at the nether regions of a woman's parts and tries to work out what elements may be stuck in there.
  • It is a test where the patterns of light emitted by the elements in a heated sample are analysed. It is fast and reliable and can be used to detect very small amounts of element in a sample.
  • It is when a sample of an element is placed under an ultra magnifying lense and tiny tiny amounts of the element can be seen. It is very accurate.

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Atoms and compounds resources »