Which one of the following would have resulted in a concentration that is higher than the actual concentration?
A - VCE - SSCE Chemistry - Question 24 - 2020 - Paper 1
Question 24
Which one of the following would have resulted in a concentration that is higher than the actual concentration?
A. The pipette was rinsed with NaOH solution.
B. The ... show full transcript
Worked Solution & Example Answer:Which one of the following would have resulted in a concentration that is higher than the actual concentration?
A - VCE - SSCE Chemistry - Question 24 - 2020 - Paper 1
Step 1
A. The pipette was rinsed with NaOH solution.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Rinsing the pipette with NaOH would lead to a higher concentration in the delivered solution since NaOH is a base and would increase the overall concentration when mixed with an acid.
Step 2
B. The pipette was rinsed with C2H4O2(COOH) solution.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Rinsing the pipette with acetic acid (C2H4O2) would not necessarily increase the concentration, as it is a comparable solution to what might be delivered.
Step 3
C. The conical flask was rinsed with NaOH solution.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Rinsing the conical flask with NaOH would also contribute to a higher concentration in the final mixture since it introduces more base into the reaction.
Step 4
D. The conical flask was rinsed with C2H4O2(COOH) solution.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Rinsing the conical flask with acetic acid (C2H4O2) solution would result in a higher concentration for the resulting solution due to the introduction of additional acid.
