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1.) Determine the pH of an HF solution of each of the following concentrations. In which cases can you not make the simplifying assumption that x is small? (Ka for HF is 6.8 x 10-4.)


a.) 0.250M b.)0.0500M c.)0.0250M

This question deals with a solution originally containing generic substances: HA (Ka = 8.18x10-9) and NaA


A solution originally contains 75.0-mL of 1.51 mol/HA and 1.11 mol/L NaA. 


Calculate the pH after 0.410 mmol of KOH are added to the original solution. 

This question deals with a solution containing generic substances: R3N (Kb = 8.78 x 10-5) and R3NHCl


An aqueous solution containing 0.442 M R3N and an unknown amount of R3NHCl has a pOH of 4.65.


Calculate the concentration (in M) of R3NHCl in the aqueous solution.

separation of mixture of m-nitroanile, benzoic acid and naphthalene by extraction reaction mechanism

Balance the following skeletal half-reaction in acidic conditions.




Select the correct coefficient and the correct side of the reaction equation for each of the following entities.


Entity Coefficient (1-10) Side of reaction equations(REACTANT/PRODUCT)

H+ (aq)





The half-reaction in question 1 is classified as 

Select one:




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