If 36.0 mL of H₃PO₄ react exactly with 80.0 mL of 0.500 M NaOH, what is the concentration of the phosphoric acid?

estimate on the basis of CTST, the pre-exponential factor at 300 K for the following types of gas reactions: 1) a bimolecular reaction between an atom and a diatomic molecule with the formation of a linear activated complex. b) a bimolecular reaction between two diatomic molecules that form a linear activated complex with no free rotation

Calculate the theoretical yield of acetaminophen:

and

Percent yield

p-aminophenol: 0.5 g

acetic anhydride: .550mL

Product mass 1.297

An electrochemical cell is based on the following two half-reactions:
Ox: Pb(s)→Pb2+(aq, 0.15 M )+2e−
Red:MnO−4(aq, 1.70 M )+4H+(aq, 1.5 M )+3e−→ MnO2(s)+2H2O(l)

Compute the cell potential at 25 ∘C.

If the specific heat of a solution is 4.18 J/g^oC, and you have 206 mL (1.03 g/mL) which increases in temperature by 2.6 degrees, how many kilojoules did the solution absorb?

(A) Calculate the molarity of commercially available concentrated nitric acid reagent given the following data:

Molecular formula: HNO3

Molar mass = 63.01 g/mol

Purity/Reagent Concentrate: 70.9% (w/w)

Specific gravity @20 degrees Celsius = 1.423

(Hint: Using the specific gravity, calculate the mass of one liter solution. Of this mass, only 70.9% is pure HNO3; the remainder being water).

(B) To make 212 mL of 0.15 M solution of nitric acid, what volume of the concentrated nitric acid will be needed?

Final answer: (A) Molarity of concentrated HNO3 = _ M. (B) Volume of conconcentrated HNO3 required = _ m

A student designs an ammeter (a device that measures electrical current) that is based on the electrolysis of water into hydrogen and oxygen gases. When electrical current of unknown magnitude is run through the device for 3.50 min , 11.4 mL of water-saturated H2(g) is collected. The temperature and pressure of the system are 25 ∘C and 715 torr.

How many moles of hydrogen gas are produced?

Express your answer to three significant figures and include the appropriate units.

Consider the he kinetics data below. Note that two reactions were studied. Use the information to calculate the EQUILIBRIUM CONSTANT for

            2 NOCl (g) -> 2NO(g) + Cl₂  

                                                                        [NO]               [Cl₂]                initial rate

                                                                        0.10M             0.10M             0.54M/s

                                                                        0.10M             0.20M             1.05M/s

2NO(g) + Cl₂(g) -> 2NOCl(g)                    0.10M             0.30M             1.62M/s

                                                                        0.10M             0.40M             2.16M/s

                                                                        0.20M             0.50M             10.8 M/s

                                                                        0.30M             0.50M             24.3 M/s

                                                                        0.40M             0.50M             43.2 M/s

[NOCl]            time

5.00M             0s

4.55M             5.0 x 10⁵s

2NOCl(g) -> 2NO(g) +   Cl₂(g)                   4.174M           1.0 x 10⁶s

3.855M           1.5 x 10⁶s

3.582M           2.0 x 10⁶s

How can you distill and purify a compound at temperature below its normal boiling point?

The decomposition of solid ammonium hydrogen sulfide to form ammonia gas and hydrogen sulfide gas is an endothermic process.A 6.1589-g sample of the solid is placed in an evacuated 4.000-L vessel at 24.00C.After equilibrium is established, the total pressure inside the vessel is 0.709 bar and some of the solid remains in the vessel.

a.Calculate K_P for the reaction.

b.Calculate the percent of the solid that has decomposed.

c.If the system was at equilibrium and the volume of the container were to double under isothermal conditions, what would happen to the amount of solid remaining in the vessel?Explain in mathematical terms using the reaction quotient, Q.

d.What would happen to the system at equilibrium if the temperature were to increase?Explain.

A 10.0mL sample of calcium hydroxide solution required 26.85mL of 0.225M hydrochloric acid for neutralization.

Calculate the molar concentration of the base.

2HCl(aq) + Ca(OH)2(aq) -> CaCl2(aq) + 2H2O(I)

Chemical engineering question

A synthesis gas containing 6.4% CO₂, 0.2% O₂, 40.0% CO and 50.8% H₂ (the remainder is N₂) is burned with 40 % excess dry air (assume 21 % O₂ and 79 % N₂).

i)Identify the reactions occurring during combustion of this syngas.

ii)Calculate the amount of air added per 100 mol of syngas.

iii)If complete combustion occurs, then calculate the composition of the flue gas on a weight basis.

Pre-Laboratory Questions (An Acid Base Titration)

1. Show the reaction between HCl and NaOH. Label the acid, base, and each of the products.

2. What occurs at the equivalence point?

3. Consider the titration of 10.00 mL of 0.10 M HCl with 0.10 M NaOH

a.) What salt is formed during this reaction?

b.) Do you expect the salt solution at the equivalence point to be acidic, neutral, or basic?

4. Consider the titration of 10.00 mL of 0.10 M acetic acid (CH3COOH) with 0.10 M NaOH

a.) What salt is formed during this reaction?

b.) Do you expect the salt solution at the equivalence point to be acidic, neutral, or basic?

5. Calculate the pH of the solution in question 4 at the equivalence point.

Deterime the % of Acetic Acid in vinegar in your kitchen. Show how to determine it in words and make up random numbers to calculate it also.

Determine the purity of an Aluminum can. In words how would you determine the purity? Also, make up random numbers to calculate how to find the purity of an Aluminum can.

Identifiy the ions present in a sample possibly containing Ag+ Pb2+ Br2+ Na+ Ca2+. Construct a flowchart using these ions.

Write and balance the equation for the complete combustion of ethane, C2H6.