Chemistry CCEA AS Level 1.9 (Acid-base Titrations)
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13 Terms
What is the formula for nitric acid?
HNO3
What is the formula for sulphuric acid?
H2SO4
What is the formula for hydrochloric acid?
HCl
What is the formula for phosphoric acid?
H3PO4
What is the formula for thiosulfuric acid?
H2S2O3
What is the formula for ethanoic acid?
CH3COOH
How is the strength of an acid determined?
Its degree of dissociation. Strong acids will fully dissociate and weak acids will only partially dissociate
What is the difference between a concentrated and a dilute solution?
A concentrated solution contains a large number of moles of solute per dm^3 whereas a dilute solution contains a smaller number of moles of solute per dm^3
What is the colour change seen in methyl orange?
- Red/orange in acid
- Yellow in alkali
What is the colour change seen in phenolphthalein?
-Colourless in acid
- Red in alkali
What is a standard solution?
A solution for which the concentration is accurately known.
How do you calculate unknowns from titration results?
1. Calculate moles
2. Ratio
3. Convert moles back to whatever is asked in the question
Why is a volumetric flask inverted?
To ensure a uniform concentration across the solution
