2. Assignment 04 SCH4U ionic equlibrium

docx

School

University of Toronto *

*We aren’t endorsed by this school

Course

138H1

Subject

Chemistry

Date

Oct 30, 2023

Type

docx

Pages

4

Uploaded by DoctorFieldSalmon

Report
Assignment -04 Ionic Equilibrium SCH4U Student’s Name : Date: Knowledge / Understanding Thinking/Inquiry Communication Application Marks 7 7 7 9 30 For each question, select the best answer from the four alternatives. ( K= 7 ) 1. Which of these 1M solution will have a PH of approximately 12? a. NaH b. HCl c. CH 3 OH d. NaOH 2. When K a is large, an acid is a. strong, with high PH and an extensive dissociation b. strong, with low PH and an extensive dissociation c. strong with high PH and minimal dissociation d. strong, with low PH and a minimal dissociation 3. A binary acid a. has two different elements b. has two protons c. accepts two protons d. acts as an acid and a base 4. Which of the following terms describes substances that have different colours in solutions of different P H ? a. amphiprotic b. indicators c. polyprotic d. electrolytes 5. Which of the following best describes the components of a buffer solution? a. a weak acid and a strong base in water b. a weak acid and its conjugate base in water c. a strong acid and a weak base in water d. a neutral salt in water Page 1 of 4
Assignment -04 Ionic Equilibrium SCH4U 6. Which of the following is a characteristic of a base? a. tastes sour b. feels slippery c. turns blue litmus pink d. all of the above 7. Why does the food industry often add acids to foods? a. to remove unwanted flavours b. to cause colour change c. to deter bacterial growth d. all of the above 8. Give the conjugate acids and conjugate bases of each of the entities below.( T/3) Acid Conjugate Base Base Conjugate Acid H 3 PO 4 NH 2 -- HNO 3 F -- H 2 SO 3 HPO 4 -- 9. When food enters the stomach it stimulates the production and secretion of hydrochloric acid for digestion, reducing the PH of the stomach contents from 4 to 2. Compare the {H + } before and after the change in PH. ( I/T=2) 10. What is the difference between a strong acid and a weak acid? ( T/I=2) Page 2 of 4
Assignment -04 Ionic Equilibrium SCH4U 11. How did Arrehenius describe acids and bases? (Comm 2) 12. Explain why ammonia NH 3 is a base according to the Bronsted – Lowry theory , but not according to the Arrhenius theory? (Comm 2) 13. What is a buffer? Explain the function of a buffer. ( Comm 3) 14. A 25 ml sample of hydrochloric acid , HCl is titrated with 67.2 mL of 0.125 mol/L potassium hydroxide solution, KOH. Calculate the concentration of the acid? ( App 2) 15. A chemist prepares a solution of magnesium oxide, MgO. Write the hydrolysis reaction equation and predict whether th resulting solution will be acidic , basic or neutral? ( App 2) Page 3 of 4
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
  • Access to all documents
  • Unlimited textbook solutions
  • 24/7 expert homework help
Assignment -04 Ionic Equilibrium SCH4U 16. The K b for hydrazine , N 2 H 4 (g) a rocket fuel, is 1.7x10 —6 . What is the K a of its conjugate acid , N 2 H 5 + ? ( App 2) 17. Calculate the P H , POH and (OH -- ) of a 0.0020 mol/L HBr (aq) solution. ( HBr) is an acid used in halogenation of organic chemicals). ( App 3) Page 4 of 4

Related Documents

Ch 11 Notes - Pt 2 (1).pdf
1. Assignment 1a SCH4U organic.docx
UNIT 2 TEST 2 (Structures-Prop. Matter) March - set-2.pdf
UNIT 5 TEST 5 Madina June 2022.pdf
SCH4U Quiz 5 .Electro chem summer.docx
Assignment 2 SCH4U Madina 2017.docx
Key Terms Pt 1 1-6 (1) (1).docx
UNIT 3 TEST MADINA SCH4U 2023- sst-2.pdf
UNIT 4 TEST 4 (Chemical system & Equillibrium) 2023 SCH4U.pdf
Unit V Journal.docx
worksheet 1.pdf
Class Project Unit 2-5 - weekly Submission_ENV 6302....docx
Recommended textbooks for you
Text book image
Chemistry: Principles and Reactions
Chemistry
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:Cengage Learning
Text book image
Chemistry
Chemistry
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Cengage Learning
Text book image
Chemistry: An Atoms First Approach
Chemistry
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Cengage Learning
Text book image
Chemistry
Chemistry
ISBN:9781133611097
Author:Steven S. Zumdahl
Publisher:Cengage Learning
Text book image
Introductory Chemistry: A Foundation
Chemistry
ISBN:9781337399425
Author:Steven S. Zumdahl, Donald J. DeCoste
Publisher:Cengage Learning
Text book image
Chemistry & Chemical Reactivity
Chemistry
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:Cengage Learning
SEE MORE TEXTBOOKS
Recommended textbooks for you
Text book image
Chemistry: Principles and Reactions
Chemistry
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:Cengage Learning
Text book image
Chemistry
Chemistry
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Cengage Learning
Text book image
Chemistry: An Atoms First Approach
Chemistry
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Cengage Learning
Text book image
Chemistry
Chemistry
ISBN:9781133611097
Author:Steven S. Zumdahl
Publisher:Cengage Learning
Text book image
Introductory Chemistry: A Foundation
Chemistry
ISBN:9781337399425
Author:Steven S. Zumdahl, Donald J. DeCoste
Publisher:Cengage Learning
Text book image
Chemistry & Chemical Reactivity
Chemistry
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:Cengage Learning
SEE MORE TEXTBOOKS

Browse Popular Homework Q&A

Q: a) The four nucleotides A,T,C,G are shuffled in a random order and put in a row.  How many possible…
Q: Use the Select Power slider to compare the graphs of x¹, x³, x5, x7,... What is the range of these…
Q: For the reinforced concrete floor system shown below, it is required to ONLY determine the effective…
Q: 7. Ho: sx = s US. Hass
Q: What is the characteristic sexual structure that defines each fungal phylum? -EXACT SPELLING PLEASE…
Q: A linear spring has a spring constant of 20 N/m. How far would it have to be stretched to have a…
Q: The population of a town is increasing at a rate given by P'(t) = 55 e 0.014t where P is the…
Q: A survey team is trying to estimate the height of a mountain above a level plain. From one point on…
Q: Find the complete solution of the linear system, or show that it is inconsistent. (If the system has…
Q: 12) The calculated value of the test statistic equals: a) 3.11 b) -3.11 c) -2.60 d) 2.60 e) 1.02 f)…
Q: Which of the following is the hypothesis test to be conducted? OA. Ho p0.5 Ho p>0.5 H₂₁ p=0.5 Hop…
Q: Superior Trading Co. operates in a competitive market, and decides which price to charge their…
Q: Provide and describe the five variables used in Microsoft Excel to calculate the total value of…
Q: What is the flatness tolerance for the surface being controlled in the drawing below? 25° 2.005 A A
Q: n -f(x) (c) (x - c)*. Ph(x) = Σ k! k=0 Show that for any other polynomial Qn Pn of order n it holds…
Q: Suggest a "innovative" solution to a local healthcare problem. Explain how this innovation would…
Q: Glasgow Enterprises started the period with 80 units in beginning inventory that cost $7.50 each.…
Q: Do the following industries more closely resemble a Monopolistic Competition market and / or an…
Q: Match the third order linear equations with their fundamental solution sets. 1. y - y" -y + y = 0 2.…
Q: Which of the following would decrease the concentration of Pb+2 ionized in a solution of Pbl2?…
Q: A researcher wishes to estimate the proportion of X-ray machines that malfunction. A random sample…
Q: Consider the following equilibrium, for which AH<0: How will each of the following changes affect an…
Q: Determine the mass (in grams) of Vitamin C (C6H8O6) that contains 5.373 grams of carbon. Use mass…
Q: ∫sin(3x)sin(6x)dx
Q: Find the coordinates of the x-intercepts of the graph of the equation. (If an answer does not exist,…