3) 500.0 mL of 0.110 M NaOH is added to 605 mL of 0.200 M weak acid (Ka = 2.35

Aliquots of 0.5 mg/mL standard of BSA are used to construct a standard curve for the Bradford protein assay. the tubes contain the following amounts of the BSA solution: 0,20,40,60,80 and 100 microliters. the corresponding absorbencies after adding Bradford reagent are 0,,0.05,0.09,0.14,0.19, and 0.22. If you take 20 microliters of an unknown and add 80 microliters of water, mix, take 10 microliters of the mixture and add to Bradford reagent and see an absorbance of o.o8 what is the protein concentration of the unknown?

15. The first step in the production of nitric acid is the oxidation of ammonia over a platinum catalyst to nitric oxide: 4NH₃ + 5O₂ ?4NO + 6H₂O

Under certain reaction conditions we get 90% conversion of NH₃ from a feed of 40 mol/hr NH₃ and 60 mol/hr O₂

Find the output rate of all species from the reactor

Calculate the [H3O+] of the following polyprotic acid solution: 0.400 M H3PO4.

What are the parts of the dye molecules that affect the Rf of the spots as they move up the tlc plate? Please list several and explain why using Lewis structures.

Consider the titration of 100.0 mL of 0.100 M NaOH with 1.00 M HBr. Find the pH at the following volumes of acid added: Va = 0, 1.0, 2.5, 6.5, 9.9, 10.0, 10.1, and 11.5 mL.

The heat of solution of LiCl is -37 kj/mol.

a) draw a picture to illustrate the main intermolecular force that is fromed in this process.

b) Explain why this process (dissolving LiCl in water) is exothermic.

What would happen if Chromium (II) and Sulfur bonded?

How are Ionic Bonds formed and what is the attractive force within an Ionic Bond?

1. Determine if hydrolysis occurs for each of the following ions. If it does, write the reaction for it and determine the hydrolysis constant for each ion.

a) NO3- b) OCl- c) NH2NH3+ d) H2PO4- e) CH3NH3+

2. For each of the following ionic salts, indicate whether their aqueous solutions will be acidic, basic, or neutral.

a) Ba(NO2)2 b) Na2CO3 c) NH4ClO4 d) CH3NH3Cl e) KBr

A) calculate the standard enthalpy change for the reaction

2A+B⇌2C+2D

Use the following data:

B)

For the reaction given in Part A, how much heat is absorbed when 3.70 mol of A reacts?

The solvent for an organic reaction is prepared by mixing 70.0mL of acetone

(C3H6O) with 69.0mL of ethyl acetate (C4H8O2). This mixture is stored at 25.0 ?C. The vapor pressure and the densities for the two pure components at 25.0 ?C are given in the following table. What is the vapor pressure of the stored mixture?

Part A: A calorimeter contains 17.0 mL of water at 12.0 ?C . When 2.50 g of X (a substance with a molar mass of 42.0 g/mol ) is added, it dissolves via the reaction

X(s)+H2O(l)?X(aq)

and the temperature of the solution increases to 25.5 ?C .

Calculate the enthalpy change, ?H, for this reaction per mole of X.

Assume that the specific heat of the resulting solution is equal to that of water [4.18 J/(g??C)], that density of water is 1.00 g/mL, and that no heat is lost to the calorimeter itself, nor to the surroundings.

Express the change in enthalpy in kilojoules per mole to three significant figures.

Part B: Consider the reaction

C12H22O11(s)+12O2(g)?12CO2(g)+11H2O(l)

in which 10.0 g of sucrose, C12H22O11, was burned in a bomb calorimeter with a heat capacity of 7.50 kJ/?C. The temperature increase inside the calorimeter was found to be 22.0 ?C. Calculate the change in internal energy, ?E, for this reaction per mole of sucrose.

Express the change in internal energy in kilojoules per mole to three significant figures.

In my hydrolysis lab, I had to add a few drops of 6M of NaOH into the .1M Fe(NO₃)₃ and it turned solid orange. What formula would come from that observation? Then I had to add 5mL of 6M NaOH into same solution and it was still solid orange but just more because of more NaOH added. What formula would come out of this?

Also in my hydroylis lab I had to add a few drops of 6 M NaOH into .1M AlCl₃ and it turned into a solid. What would be the formula for this? After that I added 5 mL of the 6 M NaOH into the same solution and it dissolved and was clear. What formula do I write for this?

A lead pellet with a mass of 26.47 g and at an initial temperature of 89.98 °C was dropped into a beaker containing 100.0 g of water at an initial temperature of 22.50 °C. Given the sp heat capacity of water = 4.184 J/gK and of lead = 0.158 J/gK, calculate the final temperature of both the lead and the water?