Define the following terms and draw one example of each using organic molecules:

Van der Waal's non-polar interactions, Dipolar interactions, Hydrogen Bonding.

What is the function of the silica gel in TLC experiment?

We used Chloroform:Isopropyl alcohol and Ethyl acetate:Acetic acid for solvents in TLC lab to get Rf values of aspirin and ibuprofen. What difference does it make trend wise? Also explain the observed trend in terms of the chemical structure and molecular interactions involeved between the analyte, solid phase and the mobile phase.

These are the results I got.

Chloroform:Isopropyl alcohol --> Rf of Aspirin=0.68 and Ibuprofen=0.78

Ethyl acetate:acetic acid --> Rf of Aspirin=0.79 and Ibuprofen=0.85

Thank you so much!

Silver iodide is a very insoluble compound. Please give reasons for compounds like silver sulfate or silver chloride to be insoluble that relate to ionic radius.

I want to know the whole C5H10 structures that can be formed (chain, ring...etc) including streoidimers. Thanks.

Calculate the change in pH when 7.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq). A list of ionization constants can be found here.Calculate the change in pH when 7.00 mL of 0.100 M NaOH(aq) is added to the original buffer solution.

1. A person is considered medically to have lead poisoning if they have a concentration of greater than 5.2 μg (micrograms) of lead per deciliter of blood. What is the concentration in parts per billion (ppb)? Assume 1 mL of blood weighs 1 g.

what's the effect of change in mobile phase flow rate in HPLC

and the effect of change of injection volume in HPLC?

Find the identity of a solid, weak acid, HY. The following information is obtained a) Write the dissociation equation for HY in water and its equilibrium expression (Ka). b) A sample of 0.2702 g of HY is titrated and found to require 30.00 mL of 0.10 M KOH solution to reach the equivalence point. Calculate the molar mass of HY c) After 6.00 mL of the base is added, the pH of the solution is 3.25. What is the value for Ka of HY? d) At the equivalence point of the reaction, will the solution be acidic, basic, or neutral? Justify your answer. e) What is the identity of the acid (HY)

GRIGNARD REACTION:

Precise mass (in grams) of the bromobenzene used: .21g

Precise mass (in grams) of the magnesium used: .054g

Precise mass (in grams) of the benzophenone used: .350g

Precise mass (in grams) of the product: .011g

What is the percent yield? (show all calculations)

For my chemistry final, we're identifying 5 unknowns, one acid, one base, one chloride salt, one nitrate salt, and one sodium salt . On the list of possible unknowns, there are:
three acids (HCl, HNO3, or HSO4)
three bases (NaOH, NH3, or NaS)
three chloride salts (NaCl, BaCl, or CuCl)
three nitrate salts (AgNO3, Cu(NO3)2, or Fe(NO3)3
three sodium salts (NaI, Na2SO4, or Na2CO3)

We will be given 5 test tubes each containing one of the substances from each category above. If anyone could provide a flowchart and/or explaination (IN Steps) on how I could identify each unknown category, please help???

Please dont give me this answer https://answers.yahoo.com/question/index?qid=20140527021948AAsGNL8
i copy and paste my question from there, I wanted another insight unless there's no other way other than that way?

Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.500 M phosphoric acid solution.

pKa1= 2.16 pKa2=7.21 pKa3= 12.32

What's: H₃PO₄, H₂PO₄^-, HPO₄^-2, PO₄^-3, H, OH, and pH

-Thanks!

For a monochromator with a 0.540 meter focal length equipped with a 2200 gr/mm grating that measures 100m x 100m

(a) Calculate first order reciprocal linear dispersion

(b) A substance has two emission lines at 2024.41 angstrom and 2024.81; is it theoretically possible to just resolve these spectral features using the grating described?

(c) If a 25 micrometer entrance and exit slits are used in order to have sufficient light throughput for a detectable signal, is it possible to baseline resolve the two spectral lines

You have 500.0 mL of a buffer solution containing 0.20 M acetic acid and 0.30 M sodium acetate. What will the pH of the solution be after the addition of 20.0 mL of 1.00 M NaOH solution. K_a (CH₃COOH) = 1.8x10⁵

Please answer the question using ICE tables, I am unsure of whether to use 1 ICE table or 2 ICE Tables. Thank you.

Cyclohexane has a freezing point of 6.50 ∘C and a Kf of 20.0 ∘C/m. What is the freezing point of a solution made by dissolving 0.771 g of biphenyl (C12H10) in 25.0 g of cyclohexane?

Would we expect that the co-polymer produced by anionic polymerization of butadiene and styrene to be easily cross-linked? Yes or No and please explain why

7. (8%) How to dispense one liter of 3 M HCl solution if you have a bottle of HCl that you find in the chemical stores? The bottle contains the following information: “37% w / w HCl (aq), density: 1.19 kg / L, molecular weight of HCl = 36.5 g / mol. ”