Calculate the concentration of free mercury (II) ion, [Hg²⁺], in an aqueous solution that is initially 0.16 M Hg(NO₃)₂ and 3.2 M NaCl given that the K_f of HgCl₄^2- is 1.7*10¹⁶.

The answer is 2.2*10^-19 M, how?

What is the ratio [CH₃COOH]/[CH₃COO^-] in a solution made by mixing 100 mL of 0.500 M CH₃COONa with 50.0 mL of 0.0500 M NaOH? (CH₃COOH Ka = 1.8 x10^-5 )

• A.) 4.1 x 10^-5
• B) 2.2 x 10^-8
• C) 1.1 x 10^-8
• D) 3.3 x 10^-8
• E) 8.3 x 10^-9

At a certain temperature and total pressure of 1.2 atm, the partial pressures of an equilibrium mixture for 2A(g) <==> B(g) are Pa = 0.60 atm and Pb = 0.60 atm. After a disturbance, the system regains equilibrium with a total pressure of 1.9 atm. What is the partial pressure of A at the new equilibrium?

Answer in atm

Please show all work I have tried this problem twice and have gotten wrong answers would like to see the differences in steps.

Consider the titration of a 23.4 −mL sample of 0.125 M RbOH with 0.105 M HCl. Determine each quantity:

the pH after adding 4.1 mL of acid beyond the equivalence point

Express your answer using two decimal places.

A) Calculate E° for the reaction:

2 MnO₄^- + 10 Cl^- + 16 H₃O⁺ →2 Mn²⁺ + 5 Cl₂ + 24 H₂O

E°_{MnO4^-/Mn²⁺, H3O⁺} = +1.507, E°_Cl2/Cl^- = +1.358

Round your answer to 3 significant figures.

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B) Use standard reduction potentials to calculate ΔG° for the reaction:

3 I₂ + 5 Cr₂O₇^2- + 34 H₃O⁺ →6 IO₃^- + 10 Cr³⁺ + 51 H₂O

E°_{IO3^-/I2, H3O⁺} = +1.195, E°_{Cr2O7^2-/Cr³⁺, H3O⁺} = +1.232

1. A certain proton NMR spectrum (recorded on a 400 MHz NMR spectrometer) consists of one singlet and one doublet. The singlet has a chemical shift of 5.0 ppm. The doublet is 2600 Hz upfield from the singlet. Which one of the following statements is correct?

A) The chemical shift of the doublet (on the delta scale) is positive

B) The chemical shift of the doublet (on the delta scale) is negative

2. Which one of the following statements is correct?

A) The electromagnetic radiation used in IR spectroscopy is higher in energy than that used in X-ray crystallography

B) The electromagnetic radiation used in IR spectroscopy is lower in energy than that used in X-ray crystallography

In a constant‑pressure calorimeter, 60.0 mL of 0.920 M H 2 SO 4 was added to 60.0 mL of 0.360 M NaOH . The reaction caused the temperature of the solution to rise from 22.43 ∘ C to 24.88 ∘ C. If the solution has the same density and specific heat as water ( 1.00 g / mL and 4.184 J / ( g ⋅ °C), respectively), what is Δ H for this reaction (per mole of H 2 O produced)? Assume that the total volume is the sum of the individual volumes.

suppose you dissolved 2000 U of enzyme in 1 ml of buffer. you take a 20 microlitre of diluted enzyme and add it to 1 ml of substrate solution with a concentration of 0.5mM. how long would it take to covert all of the substrate in the solution? ( assume ideal conditions)

Question #48. In a titration experiment, 50 mL of 0.1 M acetic acid (Ka = 1.75 x 10-5) was titrated with a 0.1 M NaOH (formal concentration) at 25 ºC. The pH of the solution at the equivalence point will be this: Please show work (1) 7.00; (2) 8.73; (3) 9.06; (4) None of the above

A 2.250×10⁻² M solution of glycerol (C3H8O3) in water is at 20.0∘C. The sample was created by dissolving a sample of C3H8O3 in water and then bringing the volume up to 1.000 L. It was determined that the volume of water needed to do this was 999.0 mL . The density of water at 20.0∘C is 0.9982 g/mL.

Part A:  

Calculate the molality of the glycerol solution.

Express your answer to four significant figures and include the appropriate units. Definitely not 0.0225

Part B: Calculate the mole fraction of glycerol in this solution.

Express the mole fraction to four significant figures. definitely not 55.40

Part C:  Calculate the concentration of the glycerol solution in percent by mass.

Express your answer to four significant figures and include the appropriate units. definitely not 0.002

Sulfuryl chloride, SO2CL2, is a compound with very irritating vapors; it is used as a reagent in the synthesis of organic compounds. When heated to a sufficiently high temperature, it decomposes to So2 and Cl2 .

Kc= 0.045 at at 375°C

Complete the stoichiometry table using the starting values provided.

theoretical product

melting point of triphenylmethanol ...................... in degree celsius

Select the name of the catalyst used for this reaction, if there was no catalyst used, select none:

a) bromobnzene

b) magnesium

c) benzophenone

d) diethyl ether

e) none

Please clearly state step by step solution to show how you arrived with final answer. (your help will be so much for me if you can state step by step solution). Thanks!

1. Explain how an emulsifier can combine a nonpolar substance with a polar substance.

2. Mayonnaise is a thick mixture containing oil, vinegar (water-based), and a phospholipid molecule called lecithin found in the yolks of eggs. Mayonnaise cannot be made without lecithin. Explain why lecithin is a critical ingredient.?

14) you are titrating 10.0mL of a solution of 0.25M acetic acid (Ka=1.8 x 10 ^-5). you are using a solution of 0.10M KOH to complete the titration curve. create the graph that would result by adding 1.0mL of the base to the acid and determining the pH and repeating until you have passed the equivalence point. Start the graph with 0 mL of the base solution added.