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Chemistry
Section 4 (Inorganic Chemistry)
| Question | Answer |
|---|---|
| What colour are halide salts? | Colourless |
| What colour is bromine water? | Orange |
| What colour is chlorine water? | Colourless |
| What colour is iodine water? | Brown |
| When mixing halide salts with halogen waters, the _______________ element will dictate the colour of the solution | displaced |
| What observations will be made during the combustion of magnesium? | - Intense white flame - White powder produced (magnesium oxide) |
| What observations will be made during the combustion of hydrogen? | - Water produced |
| What observations will be made during the combustion of sulfur? | - Blue flame - Colourless, poisonous gas produced |
| Combustion reactions can also be classified as what other reaction? | Oxidation reaction |
| What does the term cation mean? | Positively charged ion |
| What colour flame do lithium ions burn with? | Red |
| What colour flame do sodium ions burn with? | Yellow |
| What colour flame do potassium ions burn with? | Lilac |
| What colour flame do calcium ions burn with? | Orange-red |
| What colour flame do copper ions burn with? | Blue-green |
| How do you clean a platinum wire loop before conducting a flame test? | Dip it in dilute hydrochloric acid and hold it in a flame |
| When sodium hydroxide is added to a copper solution, what colour precipitate will form? | Blue |
| When sodium hydroxide is added to an iron (II) solution, what colour precipitate will form? | Sludgy green |
| When sodium hydroxide is added to an Iron (III) solution, what colour precipitate will form? | Reddish brown |
| How can you test for ammonium ions in a substance? | Add sodium hydroxide to a solution of the substance. Place a damp piece of red litmus paper above the test tube. If it turns blue, ammonium ions are present |
| How can you test for carbonates? | Add dilute hydrochloric acid to the test sample. If carbonates are present, CO2 will be released, which you can test for using limewater |
| How can you test for sulfates? | - Add dilute hydrochloric acid and barium chloride solution - White precipitate of barium sulfate will form if compound was a sulfate |
| How can you test for chloride? | - Add dilute nitric acid, followed by silver nitrate solution - WHITE precipitate forms |
| How can you test for bromide? | - Add dilute nitric acid, followed by silver nitrate solution - CREAM precipitate forms |
| How can you test for iodide? | - Add dilute nitric acid, followed by silver nitrate solution - YELLOW precipitate forms |
| What is the test for chlorine? | Chlorine bleaches damp blue litmus, turning it first red, then white |
| What is the test for oxygen? | Oxygen relights glowing splint |
| What is the test for carbon dioxide? | Carbon dioxide turns limewater cloudy when bubbled through it |
| What is the test for hydrogen? | Hydrogen makes a 'squeaky pop' with a lighted splint |
| What is the test for ammonia? | Ammonia turns damp red litmus paper blue |
| How can you test for water? | - Add anhydrous copper(II) sulfate - If powder turns blue, the substance is water though it may not be pure |
Created by:
JoeMather
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