4. Circle the letter for each true statement. If a statement is false, make it t

ID: 856833 • Letter: 4

Question

4. Circle the letter for each true statement. If a statement is false, make it true.

a. The pH is 7 at the equivalence point.

b. [H+] is less than [OH-] after the equivalence point is reached.

c. As base is added the pH increases slowly, then a large increase occurs.

d. As base is added the pH increases until the half equivalence point is reached , then the pH remains constant as more base is added.

e. At the equivalence point [H+] = Ka.

f. Before the half equivalence point the concentration of weak acid is less than the concentration of its conjugate base.

g. After the first mL of NaOH is added, the solution in the beaker is a buffer.

h. If the weak acid is diprotic, there are two endpoints in the.

i. After the equivalence point is reached, the solution in the solution in the beaker is a weak acid.

j. An indicator that changed color between pH = 2 and pH = 4 is suitable for the titration.

a. The pH is 7 at the equivalence point.

b. [H+] is less than [OH-] after the equivalence point is reached.

c. As base is added the pH increases slowly, then a large increase occurs.

d. As base is added the pH increases until the half equivalence point is reached , then also pH increases more base is added.

e. At the equivalence point [H+] =[OH-]

f. Before the half equivalence point the concentration of weak acid is less than the concentration of its conjugate base.

g. After the first mL of NaOH is added, the solution in the beaker is a buffer.

h. If the weak acid is diprotic, there are two endpoints.

i. After the equivalence point is reached, the solution in the beaker is a weak acid.

j. An indicator that changed color between pH = 2 and pH = 4 is suitable for the titration.( Methyl Orange)

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