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In a laboratory
investigation, a 0.010 M NaOH(aq)
solution with a pH value of 12.00 is
used to determine the molarity of a
HCl(aq) solution. A 10.0-mil1i1iter
sample of the HCl(aq) is exactly
neutralized by 20.0 milliliters of
the 0.010 M NaOH(aq). During this
laboratory activity, appropriate
safety equipment is used and safety
procedures are followed.
78
State the color of the indicator
litmus in a sample of the original
NaOH(aq) solution.
| Answer--> Blue
(use table M pH is 12) |
79 Determine the pH value of a
solution that has a hydronium ion
concentration 100 times greater than
the original NaOH(aq) solution.
| Answer--> 10
(there are 2 zeros in 100,
so it changes by 2,
hydronium increasing is more
acidic pH goes down by 2) |
80 Identify the
positive ion in the original
HCl(aq) solution.
| Answer--> hydrogen,
hydronium, H+, H3O+
(not H...no credit,
must have a charge if you
use symbols) |
81 Determine the molarity
of the HC1(aq) solution using
the titration data.
| Answer--> 0.02M
work was MV=MV
20.0mL x 0.010M = M x 10.0mL |
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