For the following question please show all work and species. For the titration of 20.00 mL of 0.150 M NaOH with 0.250 M

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For the following question please show all work and species. For
the titration of 20.00 mL of 0.150 M NaOH with 0.250 M HF. (Ka for
HF is 6.8 x 10-4)
1. Write the molecular equation with state symbols
2. Calculate the initial pH. Indicate species present
3. Calculate the pH after 5.00 mL of HF has been added. Indicate
species present
4. Calculate pH at equivalence point. Indicate species
present
5. Calculate the pH after 6.00 mL extra of HF has been added.
Indicate species present