Exam (elaborations)
Straighterline Chemistry Final- deck 3 Exam
- Institution
- Straighterline Chemistry Final- Deck 3 Exam
Straighterline Chemistry Final- deck 3 Exam
[Show more]
Content preview
Straighterline Chemistry Final- deck3 Exam
Which is more soluble in an acidic solution than in pure water?
Select one:
a. CuI
b. PbCl2
c. Ca3(PO4)2
d. NaNO3
e. NaBr - -c. Ca3(PO4)2
-What is the name of the principle of selective precipitation used to identify
the types of ions present in a solution?
Select one:
a. Ionization
b. Selective ion precipitation
c. Selective ion typing
d. Limited precipitation
e. Qualitative analysis - -e. Qualitative analysis
-A 10.0-mL sample of 0.75 M CH3CH2COOH is titrated with 0.30 M NaOH.
What is the pH of the solution after 22.0 mL of NaOH have been added to the
acid?
[Ka(CH3CH2COOH) = 1.3 × 10-5]
Select one:
a. 5.75
b. 4.94
c. 4.83
d. 4.02
e. 3.95 - -a. 5.75
-Methyl red is a common acid-base indicator. It has a Ka equal to 6.3 × 10-6.
Its un-ionized form is red and its anionic form is yellow. What color would a
methyl red solution have at pH = 7.8?
Select one:
a. green
b. red
c. blue
d. yellow
e. violet - -d. yellow
, -A 25.0-mL sample of 0.10 M C2H5NH2 (ethylamine) is titrated with 0.15 M
HCl. What is the pH of the solution after 9.00 mL of acid have been added to
the amine?
[Kb(C2H5NH2) = 6.5 × 10-4]
Select one:
a. 11.08
b. 10.74
c. 10.81
d. 10.55
e. 10.49 - -b. 10.74
-A 35.0-mL sample of 0.20 M LiOH is titrated with 0.25 M HCl. What is the pH
of the solution after 23.0 mL of HCl have been added to the base?
Select one:
a. 1.26
b. 1.67
c. 12.33
d. 12.74
e. 13.03 - -c. 12.33
-A 25.0-mL sample of 1.00 M NH3 is titrated with 0.15 M HCl. What is the pH
of the solution after 15.00 mL of acid have been added to the ammonia
solution?
[Kb(NH3) = 1.8 × 10-5]
Select one:
a. 10.26
b. 9.30
c. 9.21
d. 8.30
e. 8.21 - -a. 10.26
-When a strong acid is titrated with a weak base, the pH at the equivalence
point
Select one:
a. is greater than 7.0.
b. is equal to 7.0.
c. is less than 7.0.
d. is equal to the pKa of the conjugate acid.
e. is equal to the pKb of the base. - -c. is less than 7.0.
-A buffer is prepared by adding 300.0 mL of 2.0 M NaOH to 500.0 mL of 2.0
M CH3COOH. What is the pH of this buffer? [Ka(CH3COOH) = 1.8 × 10-5]
Select one:
a. 4.57
b. 4.52
c. 4.87
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Victorious23. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £8.56. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
78252 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now