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6. What is an example of a tribasic acid?
7. For strong acids, why does [H+] = [HA] ?
- H+ and HA react together in equal quantities
- because the acid dissociates completely
- because the acid doesn
8. What is a buffer?
- a mixture that minimises the changes in pH on addition of small amounts of base
- a mixture that minimises the changes in pH on addition of small amounts of acid and alkali
- a mixture that minimises the changes in pH on addition of small amounts of alkali
- a mixture that minimises the changes in pH on addition of small amounts of acid
9. What is the end point?
- point at which the concentrations of the weak acid and the conjugate base of an indicator are equal
- when there is a higher concentration of weak acid than conjugage base in the indicator mixture
- when there is a higher concentration of conjugate base than weak acid in the indicator mixture
10. what is the equation for Kc (where A and B are reactants, and C and D are products)
- Kc = ( [A]^a x [B]^b )
- Kc =( [A]^a x [B]^b ) / ( [C]^c x [D]^d )
- Kc = ( [C]^c x [D]^d ) / ( [A]^a x [B]^b )
- Kc = ( [C]^c x [D]^d )