Chemistry things i need to remember

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Flame tests
Ca2+ brick red. Sr2+ red. Ba2+ pale green.
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Test for ammonium ions
If you add OH ions to a solution containing ammonium ions they will react to produce ammonia gas and water. If there's ammonia given off, ammonium ions must be present. A damp piece of red litmus paper will turn blue to prove this.
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Test for sulfate ions
Add a little bit of dilute HCl, followed by BaCl solution. If a white precipitate forms, it means the original compound contained a sulfate.
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Tests for hydroxide ions
Use a pH indicator to test for this. If you dip a piece of damp red litmus paper into a solution that contains hydroxide ions, it will turn blue.
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Tests for halide ions
Add dilute HNO3, followed by AgNO3. Cl gives you a white precipitate, Br gives you a vream precipitate and I gives you a yellow precipitate. These precipiates can look similar, so if you add dilute NH3 or conc NH3.
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Tests for carbonate ions
Add HCl an dif it fizzes then carbonate ions are present. You can test for CO2 by using limewater; CO2 turns limewater cloudy.
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Other cards in this set

Card 2

Front

If you add OH ions to a solution containing ammonium ions they will react to produce ammonia gas and water. If there's ammonia given off, ammonium ions must be present. A damp piece of red litmus paper will turn blue to prove this.

Back

Test for ammonium ions

Card 3

Front

Add a little bit of dilute HCl, followed by BaCl solution. If a white precipitate forms, it means the original compound contained a sulfate.

Back

Preview of the back of card 3

Card 4

Front

Use a pH indicator to test for this. If you dip a piece of damp red litmus paper into a solution that contains hydroxide ions, it will turn blue.

Back

Preview of the back of card 4

Card 5

Front

Add dilute HNO3, followed by AgNO3. Cl gives you a white precipitate, Br gives you a vream precipitate and I gives you a yellow precipitate. These precipiates can look similar, so if you add dilute NH3 or conc NH3.

Back

Preview of the back of card 5
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