1.If an indication of the buffer capacity of a 0.010M buffer is measured as 20 d

Question

1.If an indication of the buffer capacity of a 0.010M buffer is measured as 20 drops of added acid, predict how many drops of acid could be added to the buffer if it had a concentration of 0.100M?

Select one:

a. 200

b. 20

c. 2

2.An acid + base produces

Select one:

a. a weak acid and its conjugate base

b. a salt + water

c. a solution with high pH

d. a buffer solution

3.If 20.00 mL of stock solution with concentration of 50.00 mgL-1 is diluted to 100.00 mL, the dilute soluion will have a concentration of

Select one:

a. 10.00 mg per L.

b. 25.00 mg per L.

c. 5.00 mg per L.

d. 20.00 mg per L.

4.The nitrite ion is represented as

Select one:

a. NO2-

b. NO32-

c. NO22-

d. NO3-

5.In the synthesis of aspirin, which reagent is present in excess?

Select one:

a. Acetic anhydride

b. Salicylic acid

Explanation / Answer

1) option c.

2) option b.

3) It should be 5. Option c.

4) option a.

5) option b.

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