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Macmillan Learning Complete the Ksp expression for Ag₂CO3. Ksp = 8.46 × 10-12 = MacBook Pro Search or type URL

Ascorbic acid, H2C6H6O6, is a diprotic acid usually known as vitamin C. For this acid, pKa1 is 4.10 and pKa2 is 11.79. When 125 mL of a solution of ascorbic acid was evaporated to dryness, the residue of pure ascorbic acid had a mass of 3.64 g. Your answer is correct. Calculate the molar concentration of ascorbic acid in the solution before it was evaporated. 0.164 Hint Your answer is partially correct. What was the pH of the ascorbic acid solution before it was evaporated? pH = 2.44 What was the concentration of the ascorbate ion, C6H6062, before the solution was evaporated? i M M

Calculate the pH and the equilibrium concentrations of HC6H606 and C6H606²- in a 0.1550 M ascorbic acid solution, H₂C6H606 (aq). For H₂C6H606, Ka1 = 7.9x10-5 and Ka2 = 1.6x10-12 pH = [HC6H606] = [C6H606²-] = M M

NaCr20, H2SO.

Calculate the pH and the equilibrium concentrations of HC6H6O6- and C6H6O62- in a 0.2410 M ascorbic acid solution, H2C6H6O6 (aq).For H2C6H6O6, Ka1 = 7.9×10-5 and Ka2 = 1.6×10-12  pH =   [HC6H6O6-] =  M [C6H6O62-] =

Complete the sentence to make it true. The single most important contribution to the stability of a water soluble globular protein's conformation appears to be the sum of free energies of formation of many weak interactions among the hundreds of amino acids in a protein. entropy increase from the decrease in the number of ordered water molecules forming a solvent shell around the unfolded protein. sum of free energies of formation of many weak interactions between a protein's polar amino acids and surrounding water. maximum enthalpy increase from ionic interactions between the ionized amino acids in a protein. stabilizing effect of hydrogen bonding in a protein between the carbonyl group of one peptide bond and the amino group of another

(4d-202) A buffer solution is made by mixing H3PO4 and NaH2PO4 in water. How does this buffer system neutralize an addition of 5 mL of 0.45 M NaOH? Choose one of the options below. • The H3PO4, as a weak acid, will neutralize the added NaOH • The NaH2PO4, as a weak base, will neutralize the added NaOH • The H3PO4, as a weak base, will neutralize the added NaOH • The NaH2PO4, as a weak acid, will neutralize the added NaOH For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). Paragraph Arial 14px A v Ix Q x² X, g ST 田用国 EXE ABC Ť {;} +) P. O WORDS POWERED BY TINY +]

2CH3CH₂ + Pb²+. I SH

Define pKa and provide at least one method for determining its value.

Element: Mercury

Please answer the following question:

* 10.04 pH and Acidity: Introducti x 101 Chem101 b Search results for 'Complete the x A app.101edu.co Question 15 of 35 Submit Complete the balanced chemical reaction for the following weak base with a strong acid. In this case, write the resulting acid and base as its own species in the reaction. CH;NH2(aq) + HCIO;(aq) - 4- O3- D2- O2+ 3+ D4+ 1 2 4 6. 7 1 3 4 7 8 (s) (1) (g) (aq) OH- C H N H20 Reset • x H2O Delete 1L

(4c-201) Copy the following equation, and label the Bronsted-Lowry acid, its conjugate base, the Bronsted-Lowry base, and its conjugate acid. HNO3 + H2O → H30* + NO3¬ For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). BIUS Paragraph Arial 14px A v ... In X2 田由田図 EX: ABC Ť {;} > >

Estimate the Keq for the acid/base equilibria below using pKa Values. (Not provided so I have been looking in my text book and online and not getting anywhere..)

Determine the principal species at the following pH levels for Nitrilotriacetic acid. The most protonated form is C6H10NO6+. pH= 1,2,3,4,10. pK1 = 1.0, pK2 = 1.81, pK3 = 2.52, pK4 = 9.46.

The base association constants of phosphate are Kb1  0.024, Kb2  1.58  107, and Kb3 1.41  1012. From the Kb values, calculate Ka1, Ka2, and Ka3 for H3PO4.

Tom, an analytical chemist, bought a bag of decaffeinated coffee from a grocery store. However,Tom suspected that he might have received regular coffee and therefore decided to analyze hiscoffee for caffeine. In the lab, he took 0.5 mL of the brewed coffee and diluted it in water tomake a 100.0 mL solution. He performed four analyses and found the concentrations to be 4.69,3.99, 4.12, and 4.50 mg/L, respectively. (Assume the density of all solutions is 1.000 g/mL,1oz= 28.35 mL).(a) Report the concentration (in mg/L) of caffeine in the brewed coffee using the format asaverage ± standard deviation. (Note this is not the concentration in the diluted solution.)(b) Look up the caffeine content of regular vs. decaffeinated coffee. Do you think that Tom wasgiven the wrong type of coffee?(c) Caffeine intake of 300 mg per day reportedly has no adverse effects in the vast majority ofthe adult population. If Tom drinks 3 cups (8 oz/cup) of this coffee daily, is his intake withinthis known safe…