Chemistry

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Alkali
A base that dissolves in water.
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Salts from carbonates
2HCl+CaCO3-->CaCl+H2O+CO2
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Salts from bases
2HCl+CaO-->CaCl2+H2O
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Salts from alkalis
HCl+NaOH-->NaCl+H2O
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What is hydrous and anhydrous?
hydrous contains water molecules, anhydrous does not.
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Water of crystallisation
refers to water molecules that form an essential part of the crystalline structure of a compound.
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Formulas for water of crystallisation
Use n=m/Mr of anhydrous and of water molecules. Determine formula from answers.
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Titrations
1. use a pipette to measure volume of one solution into flask. 2. other solution placed into burette. 3. solution in burette added to flask until end point.
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What colours do methyl orange, bromothymol blue and phenolphthalein go in acids, bases and what is their end point colour?
Methyl orange goes red in acid, yellow in bases and the end point colour is orange. Bromothymol goes yellow in acid, blue in base and green is the end point colour. Phenolphalein is colourless in acid, pink in bases and end point colour is pale pink.
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Other cards in this set

Card 2

Front

Salts from carbonates

Back

2HCl+CaCO3-->CaCl+H2O+CO2

Card 3

Front

Salts from bases

Back

Preview of the front of card 3

Card 4

Front

Salts from alkalis

Back

Preview of the front of card 4

Card 5

Front

What is hydrous and anhydrous?

Back

Preview of the front of card 5
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