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Balancing Redox Reactions

Q. Balance the following oxidation-reduction reactions that occur in acidic solution using the half reaction method. Mn(2+)(aq)+NaBiO3(s)➡Bi(3+)(aq) +MnO4(-)(aq)

Solved • Sep 22, 2019

Formation Constant

Q. What is the concentration of Ni^2+ if 0.223g of NiCl2 is dissolved in 250.0 mL of 0.760 M NH3? Kf ([Ni(NH3)6^2+)=5.5x10^8

Solved • Dec 10, 2019

Chemical Equilibrium

Q. Determine the equilibrium constant for the following reaction- Mg(OH)2(s) + 2 H+(aq)<---->Mg2+(aq) + 2 H2O(l) given the chemical reactions below. Mg(OH)2(s) <---->Mg2+(aq) + 2 OH–(aq) K = 5.6 x 10–12 H2O(l)<----> H+(aq) + OH–(aq) K = 1.0 x 10–14

Solved • Dec 10, 2019

The Reaction Quotient

Q. Consider the reaction A(aq) <-----> 2B(aq) where Kc=4.1 at 25C. If 0.50 M A(aq) and 1.5M B(aq) are initially present in a 1.0L flask at 25C, what change in concentration (if any) will occur in time? a. [A] will decrease ad [B] will decrease. b.[A] will decrease and [B] will increase. c. [A] will increase and [B} will decrease. d.[A] and [B] remain unchanged. e.[A] will increase and [B] will increase.

Solved • Dec 10, 2019

Conjugate Acids and Bases

Q. Identify the acid on the left side of the following equation, and identify its conjugate base on the right side. H2CO3 (aq) + H2O (l) -------> H3O+ (aq) + HCO3–(aq) Group of answer choices a)H2CO3 is the acid; H3O+ is the conjugate base. b)H2CO3 is the acid; HCO3- is the conjugate base. c)H2O is the acid; HCO3– is the conjugate base d)H2O is the acid; H3O+ is the conjugate base

Solved • Dec 10, 2019

First Order Half Life

Q. Ruthenium-106 ( 106Ru) is used to treat melanoma in the eye. This isotope decays by β−emission with a half-life of 373.59 days. One source of the isotope is reprocessed nuclear reactor fuel. How many years after 106 Ru is implanted in the eye does it take for its decay rate (or activity) to be reduced to 26.5% of the initial decay rate? Use 1 year =365 days.

Solved • Dec 9, 2019

Conjugate Acids and Bases

Q. The conjugate acid of H2PO4–2 is_______. Group of answer choices a)PO4–3 b)H3PO4 c)HPO4–2 d)H2PO4–

Solved • Dec 10, 2019