hello, i'm writing a lab report on gravimetric sulfate experiment. Ba2+ + SO4 2- -> BaSO4. disolved in HCL. Can someone please kindly help twith the experiment introduction and background by answerig these questions?? it's instruction from my instructor. I greatly appreciate.

" Explain the theory of gravimetric analysis and ionic precipitation, as it applies to this sulfate experiment. Be sure to include the reaction equation, a mention of Ksp and solubility of the precipitate, excess precipitant & Le Chatalier's principlem crytal growth vs nucleation, digestion, coprecipitation (adsorption, inclusions, occlusions), quantitative wash/rinse/transfer, peptization and why you are able to use hot water to rinse instead of an ionic solution, filtration, decantation, ignition to constant mass, effect of ahless vs. regular filter paper, and how the calculation for weight percen analyte is made."

Thank you very much!!!!

Calculate the pH of a 0.0174 M solution of arginine hydrochloride (arginine·HCl, H2Arg ). Arginine has pKa values of 1.823 (pKa1), 8.991 (pKa2), and 12.01 (pKa3).Calculate the concentration of each species of arginine in the solution.

PART 1: For 500.0 mL of a buffer solution that is 0.155 M in HC2H3O2 and 0.145 M in NaC2H3O2, calculate the initial pH and the final pH after adding 0.020 mol of HCl.

...

PART 2: For 500.0 mL of a buffer solution that is 0.150 M in CH3CH2NH2 and 0.135 M in CH3CH2NH3Cl, calculate the initial pH and the final pH after adding 0.020 mol of HCl.

Use the values found in Thermodynamic Properties to determine ΔS°, ΔH° and ΔG° at 298 K for the reaction below. Enter all values to the 0.1 place.

4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g)

ΔS°

ΔH°

ΔG°

use [H+] from the FIRST equivalence point, Ka1, and equation to calculate Ka2 your trials. ka2=[H+][CO3^2-]/[HCO3-]

H+=2.29E-8 ka1=2.45E-7 mOL=.0277

Butane (at 75°F and 1 atm) is fed to a boiler at 100 mol/s with 50% excess air. 70% of the butane is consumed, and the product gas contains 10 moles CO2 per mol CO.

a) Calculate the molar composition of the stack gas on i) wet basis, and ii) dry basis.

b) Compute the volume of stack gas at 170°F and 1 atm pressure per ft^3 of Butane.

Bleeding disorder.

A 3-year old girl was brought to A&E by her father. Following a minor fall several hours ago, the child was still bleeding from the mouth. Her father said that she did have a tendency to bleed for longer than expected following immunization. However, there was no history of bruising or haematomas. There was no known family history of a bleeding disorder.

A full blood count, PT AND aPTT were ordered and the result were follows:

Full blood count : WBC: 7.9 X 10^9/L;

RBC: 5.1 X 10^12/L;

HGB: 12.3 g/dL;

HCT: 35.4%;

MCV: 84 fL;

PLT: 350 X 10^9/L;

MPV: 9.4 fL

PT/ INR: 1.1 (0.8- 1.2)

aPTT: 39.0 s (21-35 s)

Blood group (ABO): B

What do these results tell you and why?

What follow up tests should be requested at this time? Explain the reasoning for your selections.

Blood film, PFA-100, PT, aPTT, Thrombin time, Fibrinogen, Mixing test, Factoe assays, Flow cytometry.

Combustion of 8.732 mg of an unknown organic compound gave 16.432 mg of CO2 and 2.840 mg of H2O. (a) find the wt% of C and H in the substance. (b) Find the smallest reasonable integer mole ration of C:H in the compound.

For a particular redox reaction SO32– is oxidized to SO42– and Cu2 is reduced to Cu . Complete and balance the equation for this reaction in basic solution. Phases are optional.

Balance in basic conditions:

Al(s) + NO₂^-(aq) ---> Al(OH)₄^-(aq) + NH₄OH(aq)

For the system of methanol (1) / methyl acetate (2) at P=101.33kPa, use Raoult’s law to find the pure boiling temperature of each component at P=101.33kPa

Extra Info (from previous calculations):
Bubble Point - If x₁ = 0.85, x₂ = 0.15, then T_guess = 63.55C and y₁ = 0.8123, y₂ = 0.1877
Dew Point - If y₁ = 0.45, y₂ = 0.55, then T_guess = 61C and x₁ = 0.4786, x₂ = 0.5214

**ANSWER IS SUPPOSED TO BE (T₁ *=64.7C T₁ *=56.9C)
Please show how this answer is found.

A dioxin-contaminated water source contains 0.082% dioxin by mass.

How much dioxin is present in 2.6 L of this water? Assume a density of 1.00 g/mL.

Express your answer using two significant figures.

m=_____g

How many liters of C6H14(l), measured at 20 ∘C, must be burned to provide enough heat to warm 27.7 m3 of water from 19.2 to 31.4 ∘C , assuming that all the heat of combustion is transferred to the water, which has a specific heat of 4.18 J/(g⋅∘C)? Recall that 1 mL=10−3 L. Express your answer to four significant figures and include the appropriate units.

a) Show the reaction of 4-methoxyaniline hydrochloride with ammonia. Indicate which layer (aqueous or organic) each component in the reaction will mainly reside in (For both products & reactants).

b) Show the reaction of acetylsalicylic acid with NaHCO₃ (sodium bicarbonate). Indicate which layer (aqueous or organic or both) each component in the reaction will mainly reside in.

1. The following equilibrium may be established with carbon dioxide and steam. CO(g) + H2O(g) ↔ CO2(g) + H2(g) ΔH = -41.12 kJ What would be the effect of each of the following on the equilibrium and concentrations?

a.) The addition of more H2O?

b.) The removal of some H2?

c.) Raising the temperature?

d.) Increasing the pressure?

e.) Addition of a catalyst?