Calculate the cell potential for the following reaction as written at 25.00 °C, given that [Cr2 ] = 0.834 M and [Sn2 ] = 0.0190 M. Standard reduction potentials can be found here.

Provide a high level (cartoon or box model) description of how an ICP-MS and how an IC work.

A solution contains 0.018 mol each of I– , Br– , and Cl– . Use the Ksp values given below to determine how much AgCl(s) precipitates out when this solution is mixed with 200 mL of 0.24 M AgNO3.

A student left 40.0 mL of a bottle of 12.0 M HCl out overnight. The next morning, the bottle has only 35.7 mL of liquid left. Assuming that the volume change is only due to loss of water, what will be the molarity if the remaining solution is diluted to 150 mL? a)3.20 M b)2.86 M c)6.0 M d)12.0 M

Determine the mass of chloride (MW = 35.45 g/mol ) in grams present in 100 mL of a 0.187 M solution of aqueous FeCl3 (iron(III) chloride).

Limiting reactnt experiment

• What happens, if you will not stir the reaction mixture while heating on hot plate?
• What would be the effect, if you will add tap water instead of deionized water into the salt mixture?
• How will you identify the limiting reagent?
• What technique will you use to separate the un-reacted chemical from the reaction mixture?

Do emotional or pain-induced tears differ?

Is it possible to test tears and deduce if they are related to physical pain or emotion, if so what is the difference between the two?

what are the advantages of GC/Ms compared to GC with other detectors?

An aqueous solution of ___ will produce a neutral solution?

a. RbBr

b. LiNO₂

c. LiF

d NH4ClO₄

e. Rb₂CO₃

Rank these forces from weakest to strongest:

dispersion, dipole-dipole, H-bonds, dipole-induced dipole, ion-induced dipole, and ion-dipole.

Use the rules (in order) to assign oxidation numbers to each of the elements in the compounds below.

Solve an equilibrium problem (using an ICE table) to calculate the pH of each of the following solutions.

1.0.17M CH3NH2

.17M CH3NH3Cl

a mixture that is 0.17M in CH3NH2

and 0.17M in CH3NH3Cl

When solutions of silver nitrate and calcium chloride are mixed, silver chloride precipitates out of solution according to the equation

2AgNO3(aq)+CaCl2(aq)?2AgCl(s)+Ca(NO3)2(aq)

Part A

What mass of silver chloride can be produced from 1.35L of a 0.166M solution of silver nitrate?

Express your answer with the appropriate units.

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Part B

The reaction described in Part A required 3.38L of calcium chloride. What is the concentration of this calcium chloride solution?

Express your answer with the appropriate units.

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In an experiment, an acidic compound is separated from the contaminant (either a basic or neutral compound) using liquid-liquid extraction.

List of organic extraction solvents available:

- Dichloromethane

- Diethyl ether

- Ethanol

- Ethyl acetate

- Hexanes

- Methanol

- 3 M HCl

- 3 M NaOH

What will be your approach to determining the best extraction solvent to use in this experiment from the possible organic solvents listed?

IV) Many enzymes obey simple Michaelis-Menten kinetics, which are summarized
by the equation:
rate = (V max [S])/([S]+K m ); where V max = maximum velocity, [S] = concentration
of substrate; and K m = the Michaelis constant.
It is instructive to plug in a few values of [S] into the equation to see how rate is
affected. What are the rates for [S] equal to zero, equal to K m , and equal to infinite
concentration? Show all work.