Trying to fill in as much as I can for my chemistry study guide. I only have a f
ID: 896924 • Letter: T
Question
Trying to fill in as much as I can for my chemistry study guide. I only have a few more questions. All help is greatly appreciated!
12.
A. Which of the following aqueous solutions has the highest concentration of H+ ions?
0.10 MHNO3
0.10 MNH3
0.10 MCH3COOH
B. Which of the following aqueous solutions has the lowest concentration of H+ ions?
13.
A. Rank pH from lowest to highest.
0.10 M solutions of ammonia
0.10 M solutions of hydrochloric acid
0.10 M solutions of acetic acid
0.10 M solutions of sodium hydroxide
14.
A.
16.
A. What is the pH of a solution that has a hydroxide ion concentration of 1.0×10?4 M?
B. What is the hydrogen ion concentration of a solution that has a pH of 9?
C. Oven cleaner has a pH between 13 and 14. What two whole-number values of x should be used in 1.0×10?xM to express the range of hydrogen ion concentration?
91.
HCl(aq)+NH3(aq)?Cl?(aq)+NH4+(aq)
A. Identify which of the reactants is the acid.
B. Identify which of the reactants is the base.
C. Identify the conjugate base of the acid.
D. Identify the conjugate acid of the base.
120.
A. What is the pH of an aqueous solution with [H3O+] = 2×10?14M ?
B. Rank the following from most to least acidic: [H3O+]=10^-2, [H3O+]=10^-5, pH = 2.5, pH = 4, pH = 9.
121.
Phosphoric acid reacts with water to yield dihydrogen phosphate ions and hydronium ions:
H3PO4+H2O?H2PO?4+H3O+
Identify the conjugate acid-base pairs.
A. Acid?
B. Conjugate base?
C. Base?
D. Conjugate acid?
122.
Dihydrogen phosphate reacts with water to produce hydrogen phosphate ions and hydronium ions:
H2PO4?+H2O?HPO42?+H3O+
Identify the conjugate acid-base pairs.
A. Acid?
B. Conjugate base?
C. Base?
D. Conjugate acid?
123.
What substance would you add to KF(aq) to form a buffer solution?
0.10 MHNO3 0.10 MNH3 0.10 MCH3COOHExplanation / Answer
12. A. As the nitric acid is a strong acid compared to acetic acid and ammonia 0.1M HNO3 will have highest concentration of H+ .
B. Ammonia will have lowest concentration of H+ ions since it is a base where as the other two are acids.
13.Strong acids will have lowest pH and high H+ concentrationand strong bases will have highest pH values. Increasing order of pH value for given compounds is
0.1M HCl < 0.1M acetic acid < 0.1M NH3 < 0.1M NaOH
14. A.Neutralization is a type of chemical reaction in which a strong acid and strong base react with each other to form water and salt.So here the neatralisation reactions are
HNO3(aq) + KOH(aq) -----------> KNO3(s) + H2O(l)
Ca(OH)2 (aq) + H2SO4 (aq) ------------> CaSO4(aq) + 2H2O(l)
14.B. 2KOH (aq) + H2SO4 (aq) ---------> K2SO4 (aq) + 2H2O (l)
16.A. pOH = - log [OH-] = -log 1.0x10-4 = 4
pH = 14 - pOH = 14 - 4 = 10
16. B. pH = - log [H+]
9 = -log [H+]
[H+] = 10-9 M
16. C. x = 13 and 14
91) HCl(aq) + NH3(aq) Cl(aq) + NH4+(aq)
Acid Base Conjugate base Conjugate acid
121) H3PO4 + H2O H2PO4 + H3O+
Acid Base Conjugate base Conjugate acid
122) H2PO4 + H2O HPO42 + H3O+
Acid Base Conjugate base Conjugate acid