A student adds 5.85 gm of NaCl to 1 litre of water (the pH of which was measured to be 7.0) in a flask (X)
to make a 0.1 M solution. He transfers 500 ml into another flask (Y). He covers the flask (Y) with tissue
paper and the original flask (X) with a watch glass and goes to watch a movie. When he returns to the lab
the next morning, he checks the pH of both the solutions using a perfectly calibrated pH meter. Which of
the following is correct?
A) X has pH =7 and Y has pH > 7
B) X has pH < 7 and Y has pH = 7
C) X has pH = 7 and Y has pH < 7
D) Both X and Y have pH = 7
Answers
Answered by
13
Answer:
B
Explanation:
H20 ~ (H+) + (OH-)
NaCl ~ (Na+) + (Cl-)
now....
(H+) + (Cl-) ~ HCl (Hydrochloric acid)
hence....the flask X turns slightly acidic pH < 7
no change in flask Y; pH = 7
Answered by
5
Answer:
B is the answer
Explanation:
X is an acid.......<7
Y is neutral.....so=7
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