160 g of a 0.80% sodium hydroxide solution.

The following question involves the reaction of sodium hydroxide and succinic acid. Succinic acid is diprotic: the acid (H₂C₄H₄O₄) reacts with two of its hydrogens to give C₄H₄O₄^2-. The balanced “molecular” equation for the reaction has coefficients of 2 for NaOH and 1 for succinic acid:

2 NaOH (aq) + H₂C₄H₄O₄ (aq) --> Na₂C₄H₄O₄ (aq) + 2 H₂O (l)

A student weighs 1.700 g of succinic acid and dissolves it in water in a 250.0 mL volumetric flask. A 25.00 mL sample of this solution is withdrawn and placed in a 125 mL Erlenmeyer flask, to which 5 drops of the acid-base indicator phenolphthalein is added. This solution is titrated with a sodium hydroxide solution of unknown molarity in a buret.

a) How many moles of succinic acid were weighed and dissolved in the volumetric flask?

0.0572 M

b) How many moles of succinic acid were placed in the Erlenmeyer flask?

1.43 x 10^-3 mol

c) If the unknown sodium hydroxide solution was known to be approximately 0.20 M, at approximately what buret volume would you expect the end point of the titration? Show the calculation, including the use of the appropriate coefficients, as a 2 significant figure estimate:

14.30 mL NaOH

d) If the measured volume at the end point was 13.32 mL of sodium hydroxide added, calculate the actual molarity of the sodium hydroxide solution.

0.214 M NaOH

You are going to standardize a 0.80% solution of sodium hydroxide solution for which the molarity is approximately 0.20 M. You will have dry succinic acid, a 250 mL volumetric flask, a 25.00 mL pipet, a 50.00 mL buret, a phenolphthalein indicator solution, and other standard laboratory equipment. For each titration you will withdraw a 25.00 mL sample of the succinic acid solution with a volumetric pipet. Therefore, you will deliver exactly one-tenth of your initial mass of succinic acid (to four significant figures) in each titration. In deciding the amount of succinic acid to weigh, assume that you will be using approximately 15 mL of the sodium hydroxide of approximate 0.20 M concentration for each titration, and you need enough succinic acid for ten titrations. Show how to calculate the mass of succinic acid you will need to weigh.

2. Calculate the gravimetric factor for the following: (a) Cr2O3 in Ag2CrO4 (b) CaO in CaCO3,

3.Describe briefly the mechanism of precipitate formation.

So, I have some questions about the analytical chemistry experiment "Titrations based on complex formation."
1- Can you determine Mg by displacement or back titration?
2- You need to know the amount of EDTA added to solution in back titration method but you do not need to know the amount of MgEDTA added in displacement titration. Why? Explain by giving related reactions.
3- What is the minimum pH value needed for satisfactory titrations of Ca+2 and Mg+2 cations with EDTA?

Thanks for your help.

A 7.50 -L container holds a mixture of two gases at 33 °C. The partial pressures of gas A and gas B, respectively, are 0.214 atm and 0.571 atm. If 0.220 mol of a third gas are added with no change in volume or temperature, what will the total pressure become?

The synthesis of methanol from carbon monoxide and hydrogen is carried out in a continuous vapor phase reactor at 5.00 atm absolute. The feed contains CO and H₂ in stoichiometric proportion and enters the reactor at 25 ^oC and 5 atm at a rate of 17.1 m³/h. The product stream emerges from the reactor at 127 ^oC. The rate of heat transfer from the reactor is 17.05 kW. Calculate the fractional conversion achieved and the volumetric flow rate (m³/h) of the product stream.

how to synthesise of choline?

Question 1 (1 point)
Which one of the following species would NOT
react with free radicals?

Another free radical
Carbon-Carbon double bonds
Carbon-Oxygen bonds
Carbon-Hydrogen bonds

Question 2 (1 point)
What is a requirement for the halogenation of
alkanes through a free radical process?

A catalyst
Heat or light
Water
Oxygen gas

Question 3 (1 point)
Which of the following is NOT part of a radical
reaction mechanism?

Initiation
Termination
Propagation
Extension

Question 4 (1 point)
What is the major product for the free radical
bromination of 2-methyl butane?

1-bromo-2-methyl butane
1-bromo-3-methyl butane
2-bromo-3-methyl butane
2-bromo-2-methyl butane

Question 5 (0.25 points)
Bromination is more selective than chlorination.
True
False

Question 6 (0.25 points)
Free radicals can be stabilized by resonance.
True
False

Question 7 (0.25 points)
Free radical halogenation is a substitution
reaction
True
False

Question 8 (0.25 points)
Polyethylene (PE) can be made from the free
radical polymerization of ethene.
True
False

the Diels -Alder reaction between Maleic Anhydride and furan ( balanced chemical equation and theoretical yield)

- 0.20 g of maleic anhydride and 2.5 of diethyl ether

- 0.20 ml of furan

Can you please write the balanced chemical equation and calculate the theortical yield

The reaction in which cyclohexanone is turned into cyclohexanol. It is a 1; 1 reaction- 1 molecule

of cyclohexanone produces 1 molecule of cyclohexanol

100 microLiters ( 95 mg, 0.97 mmol) of cyclohexanone is mixed with

250 microLiters of methanol

Please calculate the theortical yield- show all work and steps

5. Write in your own words, the step-wise experimental procedure for the synthesis of the unknown organic compound.

6. How will the structure of your organic product be determined using the ¹HNMR data given/acquired? That is, what is the process that you will follow to identify the compound?

Using the standard values of enthalpy changes (ΔH°) and entropy change (ΔS°) to calculate the Gibbs free energy change for the production of following metallic elements from their ore sources: (a) 2ZnO(s) 2Zn(s) + O2(g) (b) 2CaO(s) 2Ca(s) + O2(g) (c) 2Al2O3(s) 4Al(s) + 3O2(g) (d) 2MgO(s) 2Mg(s) + O2(g)

What is the Frank-Condon principle?​

Consider the following reaction:

CO2(g)+CCl4(g)⇌2COCl2(g)

Calculate ΔG for this reaction at25 ∘C under these conditions:

PCO2= 0.140 atm

PCCl4 = 0.170 atm

PCOCl2= o.740 atm

ΔG∘f for CO2(g) is −394.4kJ/mol, ΔG∘f for CCl4(g) is −62.3kJ/mol, and ΔG∘f for COCl2(g) is −204.9kJ/mol.

Express the energy change in kilojoules per mole to one decimal place.