pls answer 1-4 I would like to check with my answer

1) Saponification of triglycerides gives glycerol and fatty acid salts as shown in the equation below. The groups R1, R2 and R3 represent hydrocarbon chains that may be the same or different.

Saponification is actually a hydrolysis reaction. Explain what a hydrolysis reaction is and the role of sodium hydroxide in this process.

2)The over-the-counter drug Ibuprofen is a 1:1 mixture of R and S isomers of the compound 2-(4-isobutylphenyl)propanoic acid. The two compounds have identical physical properties, but only the S isomer has drug activity. Explain the structural difference between these isomers that accounts for these observations.

3) Halogenation of alkanes in the presence of light is an example of an organic reaction that occurs via free radical intermediates.One example of this is the reaction between methane and chlorine shown in the equations below. Free radical reactions occur in a series of steps called Initiation, Propagation and Termination. Write equations to show an example of each of these steps in the reaction of methane with chlorine in the presence of light.

Initiation reaction (1 mark)

Propagation reaction (1 mark)

Termination reaction (1 mark)

4) The preparation of ethoxybenzene from the reaction between sodium phenoxide and bromoethane is shown in the equation below. Like most organic reactions, this can be described as an interaction between an electron rich species (nucleophile) and an electron deficient species (electrophile).

a) Examine the equation and clearly label each reactant as the nucleophile or electrophile as appropriate.

b) Write an equation to show how sodium phenoxide could be prepared from phenol (hydroxybenzene).

Describe the characteristic chemical step that occurs during covalent catalysis. Which four different types of catalytic mechanisms did we discuss to hydrolyze peptide bonds in proteins?

Write the balanced net ionic equation for the reaction that occurs in the following case: Cr2(SO4)3(aq)+(NH4)2CO3(aq)→ Part b. Identify the spectator ions in this reaction

9) for the reaction
[ 2Al + 3H2SO4 → Al2(SO4)3 + 3 H2SO4] 6.0 g of Al (MW=26.98 g/mol) are added to 12.0 mL of 0.20 M of H2SO4

A) what is the limiting reagent in the above reaction?

b) how many miles of H2SO4 will be formed?

c) how many grams of Al2(SO4)3 (MW=342.15 g/mol) are produced in the reaction?

Consider a buffer made by adding 132.8 g of NaC₇H₅O₂ to 300.0 mL of 2.15 M HC₇H₅O₂ (Ka = 6.3 x 10⁻⁵) What is the pH of the buffer after 0.750 mol of H⁺ have been added?

Methanol is prepared industrially from synthesis gas (CO and H2). CO(g) + 2H2(g) ⇌ CH3OH(g); ΔH° = -21.7 kcal Would the fraction of methanol obtained at equilibrium be increased by raising the temperature? Explain.

5a. When 4.355 grams of a hydrocarbon, C_xH_y, were burned in a combustion analysis apparatus, 14.72 grams of CO₂ and 3.014 grams of H₂O were produced.

In a separate experiment, the molar mass of the compound was found to be 26.04 g/mol. Determine the empirical formula and the molecular formula of the hydrocarbon.

• Enter the elements in the order presented in the question.
  

  empirical formula =

  molecular formula =

5b.
A 12.57 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 17.83 grams of CO₂ and 10.95 grams of H₂O are produced.

In a separate experiment, the molar mass is found to be 62.07 g/mol. Determine the empirical formula and the molecular formula of the organic compound.

• Enter the elements in the order C, H, O
  

  empirical formula =

  molecular formula =

5c.

A 4.550 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 6.452 grams of CO₂ and 3.963 grams of H₂O are produced.

In a separate experiment, the molar mass is found to be 62.07 g/mol. Determine the empirical formula and the molecular formula of the organic compound.

• Enter the elements in the order C, H, O
  

  empirical formula =

  molecular formula =

Describe the principle of separation in a column used for size – exclusion chromatography. What is the separation range in term of molecular weight? Give the definition of “gel filtration: and “gel permeation”.   

When ammonia is added to a solution that has Cu(OH)2(s) precipitate in it, the precipitate dissolves. Use Le Châtelier’s principle to explain this.

1. For the following reaction, 4.68 grams of butane (C₄H₁₀) are allowed to react with 20.3 grams of oxygen gas .

butane (C₄H₁₀)(g) + oxygen(g) ---> carbon dioxide(g) + water(g)

What is the maximum amount of carbon dioxide that can be formed?

What is the FORMULA for the limiting reagent?

What amount of the excess reagent remains after the reaction is complete?

2. For the following reaction, 24.8 grams of diphosphorus pentoxide are allowed to react with 12.6 grams of water .

diphosphorus pentoxide(s) + water(l) ---> phosphoric acid(aq)

What is the maximum mass of phosphoric acid that can be formed?

What is the FORMULA for the limiting reagent?

What mass of the excess reagent remains after the reaction is complete?

3. For the following reaction, 46.0 grams of iron are allowed to react with 18.4 grams of oxygen gas .

iron(s) + oxygen(g) ---> iron(III) oxide(s)

What is the maximum mass of iron(III) oxide that can be formed?

What is the FORMULA for the limiting reagent?

What mass of the excess reagent remains after the reaction is complete?

How do you use the Rydberg equation to determine the color of a flame test for an element. For example how do we know that potassium gives off a violet color during a flame test using the Rydberg equation?

Calculate the molarity (M) of 150.6 g of H2SO4 in 1.290 L of solution.

Please explain the affects that concentration of monomer can have on typical a radical polymerization