In Part A, the mass of KHC,H,O, is measured to the nearest 0.0001 g. However, the volume of water used to dissolve the KHP does not need to be precise. Explain why the amount of water added to KHP has no effect on the experimental results.
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- May you please do question one and two.For each solute, click the button under the better solvent.O e) % KBr = % 66.2 , % KCI = % 33.8 %3D The solubility product (Ksp) for 4 points Pb(OH)2 (s) is 2.5 x 10-16. What would be the quantity of solubility by g/L of Pb(OH)2 which has Mwt =241.2 g/mole)? O 9.947 x 10-4 O 5.975 x 10-4 O 7.596 x 10-5 O 9.575 x 10-4 O 9.723 x 10-4 Calculate [H+], PH and POH 4 points
- 7 Solid lead (II) nitrate is slowly added to 125 mL of a 0.190 M potassium hydroxide solution until the concentration of lead ion is 0.0547 M. The percent of hydroxide ion remaining in solution is %. Submit Answer $ 4 R LLO % 5 [Review Topics) [References Use the References to access important values if needed for this question. Retry Entire Group T Cengage Learning | Cengage Technical Support ^ 6 * 8 more group attempts remaining MacBook Pro G H 2 & 7 A J * 0 8 ( 9 UD U K F 0 ) O ◆ P | Previous Email Instructor { [ + 11 = Next> Save and Exit } ]A 10.00 ml sample with an unknown concentration of KNO3 was studied at 60° C. If an additional 2.4 g of KNO, were added to reach saturation. What was initial concentration of Q3 KNO, in M.Dissolve 5.0 g aluminium in 150 cm3 of 25 m/m % (with density of 1.06 g/ cm3) sulfuric acidsolution. What is the mass of the produced Al2(SO4)3 ?MM[Al]=26.98 g/molMM[H2SO4]=98.08 g/molMM[Al2(SO4)3]=342.2 g/mol
- STATES OF MATTER Applying like dissolves like HO- solute : 0: || HOC-CH- OH I I OH OH I -CH₂-CH-CH-CH-CH-C-H : 0: || CH₂-C-OH | OH : 0: || NH,−C–NH, I OH : 0: || H H Which is the better solvent? :0: || CH₂ C- H 1 H-C CH₂OH Q2 CH, OH H-C .C II H H H 1 - CH₂ CH₂(CH₂), CH₂ CIH H H | C-H H : 0: || C-C-OH H 3/5To analyze an aspirin sample, 0.3470 g of crushed tablets are weighed and treated with 50.00 mL 0.1155 M sodium hydroxide, boiling for 10 minutes. Under these conditions the acid acetylsalicylic (MW, 180) reacts according to: CH3COO-C6H4-COOH + 2 OH- → OH-C6H4-COO- + CH3COO- The excess NaOH is then titrated with 11.5 mL of 0.2100 M HCl. What is the purity of said show ?.Colligative Properties and Kinetics 64 9a. Radioactive Cu decays with a t/2 of 12.8 days. What is the value of k in sec? A sample contains 28.0 mg of Cu. How many decay events will be produced in one second on average? A chemist obtains a fresh sample 2 of Cu4 and measures its radioactivity. She then determines that to do an experiment, the radioactivity cannot fall below 19.5%. How long does she have to complete the experiment?
- Consider the reaction below. What is the effect on the concentration of acetic acid (CH3CO2H), water (H20) hydronium ion (H30*), and acetate ion (CH3CO2) if H3o is added to the reaction? CH3CO2H (aq) + H20 (1) = H30* (aq) + CH3CO2 (aq) Ka=1.8x10-5 The concentration of CH3CO2H The concentration of H30* The concentration of CH3CO2¯ The concentration of H2 increases decreases does not changeBetter yield of crystal can be obtained if the alum solution is placed into refrigerator for a few days. Explain why. Solubility of alum, KAl(SO4)2•12 H2O in an aqueous solution at 0 degree Cecius is 114 g/L. In this experiment, calculate the weight of alum remain in the solution after crystallization completed. (Volume = 40 mL) p.s. please answer both questions5. From the stock solutions of 1.00-mol L acetic acid and 1.00-mol L of sodium acetate, six solutions were prepared with the acetic acid and acetate concentrations shown in the table below. The pk of acetic acid is 4.756. [Acetic acid). [Acetate). Final volume, Solutio mol L mol L ml A. 0.10 100 0.0000351 100 0.10 0.10 100 0.010 0.010 100 0.10 0.15 100 0.15 0.10 100 -1 Determine the volume of the stock solutions of 1.00-mol Lacetic acid and 1.00-mol L of sodium acetate needed to prepare the solutions. Write your answer in the table below. a. Vol. acetic acid, ml Vol. of acetate, ml Solution A b. Calculate for the initial pH of the solutions and write the pH in the table below. Solution Initial pH A Which solution(s) have the same pH? C.