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level: Level 1

Questions and Answers List

level questions: Level 1

Question	Answer
Add excess sodium hydroxide, solution turns into a green precipitate.	Test for (Fe)²⁺ ions (Metal ions (aq))
Add excess sodium hydroxide, solution turns into an brown precipitate.	Test for (Fe)³⁺ ions (Metal ions (aq))
Add a few drops of sodium hydroxide, solution turns into a white precipitate. Add excess sodium hydroxide, stays as white precipitate.	Test for (Mg)²⁺ ions (Metal ions (aq))
Add a few drops of sodium hydroxide, solution turns into a white precipitate. Add excess sodium hydroxide, stays as white precipitate.	Test for (Ca)²⁺ ions (Metal ions (aq))
Add a few drops of sodium hydroxide, solution turns into a white precipitate. Add excess sodium hydroxide, precipitate redissolves.	Test for (Al)³⁺ ions (Metal ions (aq))
Flame test, flame turns yellow.	Test for (Na)⁺ ions (Metal ions (s))
Flame test, flame turns orange-red.	Test for (Ca)²⁺ ions (Metal ions (s))
Flame test, flame turns red.	Test for (Li)⁺ ions (Metal ions (s))
Flame test, flame turns lilac.	Test for (K)⁺ ions (Metal ions (s))
Flame test, flame turns blue-green.	Test for (Cu)²⁺ ions (Metal ions (s))
Add excess sodium hydroxide, solution turns into a blue precipitate.	Test for (Cu)²⁺ ions (Metal ions (aq))
Add a few drops of dilute nitric acid then a few drops of silver nitrate. Solution turns into a white precipitate.	Test for (Cl)⁻ ions (Non-metal ions (aq))
Add a few drops of dilute nitric acid then a few drops of silver nitrate. Solution turns into a cream precipitate.	Test for (Br)⁻ ions (Non-metal ions (aq))
Add a few drops of dilute nitric acid then a few drops of silver nitrate. Solution turns into a yellow precipitate.	Test for (I)⁻ ions (Non-metal ions (aq))
Add dilute hydrochloric acid and bubble gas produced into limewater. if limewater turns cloudy, carbon dioxide is present and ions tested are carbonate.	Test for (CO₃)²⁻ ions (Non-metal ions (aq))
Add a few drops of dilute hydrochloric acid then a few drops of barium chloride. Solution turns into a white precipitate.	Test for (SO₄)²⁻ ions (Non-metal ions (aq))
Put a lit splint into a test tube of hydrogen, makes a squeaky pop sound.	Test for H₂ (Gases)
Put a glowing splint in a test tube of oxygen, relights in oxygen.	Test for O₂ (Gases)
Bubble carbon dioxide into limewater, turns limewater cloudy.	Test for CO₂ (Gases)
Put damp blue litmus paper over chlorine gas being produced. Turns red then bleaches it white.	Test for Cl₂ (Gases)
Moles = Mass/Mr	Equation for Mass, Moles and Mr
Mass = Concentration x Volume	Equation for Concentration, Mass and Volume
Moles = Concentration x Volume	Equation for Concentration, Moles and Volume
Atom economy = useful mass / total mass	Equation for Atom economy
Percentage yield = Actual yield / Theoretical yield x 100	Equation for Percentage yield
Divide by 1000.	Convert from cm³ to dm³
Divide by 1000.	Convert from g to kg
Divide by 1000.	Convert from mg to g
Divide by Relative Formula Mass.	convert from g/dm³ to mol/dm³