What is the molarity of a potassium triiodide solution, KI3(aq), if 30.00 mL of the solution is required to completely react with 25.00 mL of a 0.200 M thiosulfate solution, K2S2O3(aq)?
The chemical equation for the reaction is
2 S2O32-(aq) + I3-(aq) S4O62-(aq) + 3 I-(aq).
A) 0.0833 M
B) 0.120 M
C) 0.167 M
D) 0.333 M
Question 2
If the concentration of OH- is 1 10-2 M, the concentration of H3O+ is ________ M.
A) 1 100
B) 1 10-2
C) 1 10-7
D) 1 10-12
E) 1 10-14
Question 3
Based on the balanced chemical equation shown below, what volume of 0.250 M K2S2O3(aq), is needed to completely react with 24.88 mL of 0.125 M KI3(aq), according to the chemical equation: 2 S2O32-(aq) + I3-(aq) S4O62-(aq) + 3 I-(aq).
A) 6.22 mL
B) 12.4 mL
C) 24.9 mL
D) 99.5 mL
Question 4
Calculate the frequency of the green light emitted by a hydrogen atom with a wavelength of 486.1 nm.
A) 1.46 1014 s-1
B) 6.86 1014 s-1
C) 4.33 1014 s-1
D) 6.17 1014 s-1
E) 1.62 1014 s-1
potassium
cyclic nucleotide regulated potassium channel
Solution
Solution to exponential problem
Function, even or odd, solution
What is the identity of the precipitate? What is the molarity of the Na2CO3 solution