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.

SubmitHintsMy AnswersGive UpReview Part

Incorrect; Try Again; 5 attempts remaining

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.

SubmitHintsMy AnswersGive UpReview Part

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.

In a bromine-producing plant, how many liters of gaseous elemental bromine at 277?C and 0.935 atm are formed by the reaction of 450. g of sodium bromide and 205 g of sodium bromate in aqueous acid solution? (Assume no Br2 dissolves ad that sulfuric acid is present in large excess.)

5NaBe+NaBrO3+3H2SO4 -> 3 Br2+3Na2SO4+3H2O

Calculate the pH of the solution that results from each of the following mixtures.

55.0 mL of 0.16 M HCHO2 with 75.0 mL of 0.13 M NaCHO2

125.0 mL of 0.11 M NH3 with 250.0 mL of 0.11 M NH4Cl

C6H14(l) + Br2(l) + light → C6H13Br(l) + HBr(g) How do I explain this reaction?

Phosphorus pentachloride decomposes according to the chemical equation PCL5(g)<--->PCl3(g)+Cl2(g). Kc=1.80 at 250 C. A 0.220 mol sample of PCl5(g) is injected into an empty 3.00 L reaction vessel held at 250 �C. Calculate the concentrations of PCl5(g) and PCl3(g) at equilibrium.

23.balance Al2O3(s)+NaOH(i)+Hf(g)--> Na3AlF6+H2O(g)

a. If 11.1 kilograms of Al2O3(s), 59.4 kilograms of NaOH(l), and 59.4 kilograms of HF(g) react completely, how b. many kilograms of cryolite will be produced?

c. Which reactants will be in excess?

What is the total mass of the excess reactants left over after the reaction is complete?