1
Q
How do you tests for carbonate ions?
A
Add dilute HCl, effervescence suggests carbonate. Then bubble through limewater. Turns cloudy indicates CO2, and therefore carbonate.
2
Q
How to test for sulphate ions?
A
Add dilute HCl then add BaCl2 to form white precipitate of BaSO4.
3
Q
Why do we add HCl when testing for sulphate ions?
A
To remove any anions that would otherwise interfere with the results by giving false positives.
4
Q
How to test for Cl- ions?
A
Add AgNO3 = white precipitate. Dissolves in dilute NH3.
5
Q
How to test for Br- ions?
A
Add AgNO3 = cream precipitate, dissolves in concentrated NH3.
6
Q
How to test for I- ions?
A
Add AgNO3 = yellow precipitate, doesn’t dissolve in concentrated NH3.
AS Chemistry
flashcards
Decks in class (24)
# Cards
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2.2.1 - Electron Structure25
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2.2.2 - Bonding and Structure70
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2.1.3 - Amount of Substance62
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Bonding Definitions For 2.2.26
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3.1.2 - Group 216
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3.1.3 - The Halogens33
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2.1.5 - Redox15
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2.1.4 - Acids24
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3.1.4 - Qualitative Analysis6
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3.2.1 - Enthalpy Changes Definitions4
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4.1.1 - Basics Concepts Of Organic Chemistry25
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4.1.3 - Alkenes33
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4.1.2 - Alkanes20
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3.2.1 - Enthalpy Changes24
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4.2.1 - Alcohols21
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3.2.2 - Reaction Rates28
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3.2.3 - Chemical Equilibrium15
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4.2.2 - Haloalkanes22
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4.3.2 - Organic Synthesis30
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4.3.2 - Synthetic Routes10
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4.2.4 - Analytical Techniques10
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2.1.1 - Atomic Structure and Isotopes27
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3.1.1 - Periodicity55
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Definitions46
