Exam (elaborations)
SCSU CHE125 Final Exam Practice Questions and Answers (100% Pass)
- Course
- Institution
SCSU CHE125 Final Exam Practice Questions and Answers (100% Pass)
[Show more]
Content preview
©PREP4EXAMS @2024 [REAL EXAM DUMPS] Wednesday, July 17, 2024 1:27 AMSCSU CHE125 Final Exam Practice
Questions and Answers (100% Pass)
Percent concentration (% w/v) - ✔️✔️Number of grams of solute / 100 mL of solution
How many grams of NaCl are needed to make 250 mL of a 0.90% (w/v) solution? - ✔️✔️2.3g
NaCl
Molarity (M) - ✔️✔️moles of solute (n) / volume of solution (L)
Dilution - ✔️✔️M1V1 = M2V2
Parts per million - ✔️✔️1 gram of solute / number of grams of solution x 10^6
Parts per billion - ✔️✔️1 gram of solute / number of grams of solution x 10^9
Density of water - ✔️✔️1.0g / mL
3 memorized strong acids - ✔️✔️HCl = hydrochloric acid
H2SO4 = sulfuric acid
HNO3 = nitric acid
Monoprotic acid - ✔️✔️Can donate up to 1 proton (H+)
Diprotic acid - ✔️✔️Can donate up to 2 protons (H+)
Triprotic acid - ✔️✔️Can donate up to 3 protons (H+)
Amphiprotic - ✔️✔️A substance that can act as either an acid or a base
Relationship between pKa and Ka - ✔️✔️pKa = -log([Ka])
What is Kw - ✔️✔️Ion product of water
Kw = 10^-14
Relationship between H+, OH-, and Kw - ✔️✔️H+ x OH- = 10^-14
Relationship between pH and hydronium - ✔️✔️(H3O+) pH = -log[H+]
Relationship between pOH and hydroxide (OH-) - ✔️✔️pOH = -log([OH-])
Relationship between pH and pOH - ✔️✔️pH + pOH = 14
Page 1 of 7
, ©PREP4EXAMS @2024 [REAL EXAM DUMPS] Wednesday, July 17, 2024 1:27 AM
Relationship between pH and H+ - ✔️✔️pH = -log([H+])
Henderson-Hasselbalch equation - ✔️✔️pH = pKa + log([A-]/[HA])
Relationship between H+, A-, HA, and Ka - ✔️✔️Ka = ([H+] x [A-])/[HA]
Relationship between H+, HA, and Ka - ✔️✔️[H+] = √(Ka x [HA] )
When is a solution acidic? - ✔️✔️When its pH is less than 7.0
When is a solution basic? - ✔️✔️When its pH is greater than 7.0
When is a solution neutral? - ✔️✔️When its pH is equal to 7.0
Depronated form - ✔️✔️Conjugate base form
Protonated form - ✔️✔️Conjugate acid form
Equation when H+ ions are added - ✔️✔️H+ + A- → HA
Equation when OH- ions are added - ✔️✔️OH- + HA → H2O + A-
Which has the larger numerical value: the pKa of a stronger acid or the pKa of a weaker
acid? - ✔️✔️A weaker acid
True or False:
The pH of a 1.0 M H3PO4 solution is the same as the pH of a 1.0 M H2CO3 solution? -
✔️✔️False
The pH of a sodium formate (HCOONa) solution is
a. lower than 7
b. equal to 7
c. higher than 7
d. can't be determined - ✔️✔️c. higher than 7
Which of the following is a buffer solution? A solution that is
a. 0.1 M HCl and 0.1 M NaCl
b. 0.5 M acetic acid and 0.5 M sodium chloride
c. 02 M sodium acetate and 0.2 M HCl
d. 0.1 M acetic acid and 0.5 M sodium acetate - ✔️✔️d. 0.1 M acetic acid and 0.5 M sodium
acetate
Page 2 of 7
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 or Stuvia-credit 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 OliviaWest. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
72841 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now