H2S(aq) can be analyzed by titration with coulometrically generated I2. H2S + I2 S(s) + 2 H+ + 2 I - To 49.20 mL of sample were added 4 g of KI. Electrolysis required 812 s at 52.6 mA. Calculate the concentration of H2S (µg/mL) in the sample.
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H2S(aq) can be analyzed by titration with coulometrically generated I2. H2S + I2 S(s) + 2...
QUESTION 7 H2S (g) can be generated by the following reaction: 2 HCl(aq) + Fes(s) + FeCl2(aq) + H2S(g) What volume (at STP) of H25 gas can be generated from 10.2 mL of 0.304 M HCI and an excess of Fes? V- _- mL Click Save and Submit to save and submit. Click Save All Answers to save all answers,
Balancing redox equations (acidic Solutions) 1. IO3^- (aq) + I^- (aq) =I2 (s) 2. Zn (s) + H2SO4 (aq) = Zn^2+ (aq) + H2S (g)
QUESTION 4 Use the reaction: I2(s) - I2(aq) to calculate the molar solubility of I2(s) in water. 12(aq) + 2 e-2 l'E"-+ 0.615 V 12(s)+2e-2IE 0.5355 V A. -1.1505 B. +1.1505 C.-0.0795 D. +0.0795 E. 1.33 x 10-39 F 2.05 X 10-3 G. 1.15 X 10 H. 7.84 X 1038 I. 0.5203 Eo for the solubiliy reaction: 12(s) 12(aq) K for the solubility reaction: I2s)I2(aq) $ Molar solubility of 12(s) in water - Solubility (in g/L) of I2(s) in water...
By titration, it is found that 91.9 mL of 0.150 M NaOH(aq) is needed to neutralize 25,0 mL of HCl(aq). Calculate the concentration of the HCl solution. HCl concentration: A solution of NaCl(aq) is added slowly to a solution of lead nitrate, Pb(NO3)2(aq), until no further precipitation occurs. The precipitate is collected by filtration, dried, and weighed. A total of 19.42 g PbCl(s) is obtained from 200.0 mL of the original solution. Calculate the molarity of the Pb(NOx),(aq) solution. concentration:
A. How many liters of H2S gas could be generated at STP from the reaction of dilute HCl with 15.55 kg of an ore that is 15.7 % iron(II) sulfide by mass? C. A mass of 0.3976 gof ore was dissolved in I−(aq). The resulting solution required 17.98 mLof 0.01043 MNa2S2O3for complete titration. What is the percentage of copper in the ore? Express your answer to four significant figures and include the appropriate units. Use and preparation of hydrogen sulfide...
3.(12pts) The reaction Cl(aq) + HS(a) determined DRL S)+(aq) +2 Cl(aq) has the experimentally rate k[Cl2][H2S] Which of the following mechanisms is(are) consistent with the experimental results. Mech I Mech 11, Mech III Cl2 +H2S >H CI CI+HS (slow) CI+ + HS. …>H+ + Cl. + S H2S = HS. + H+ HSCl2 2CI +S+H (fast) (fast equil) (slow) H2S HS+H (fast equil) (fast equil) (slow) 4. (10 pts) Write the equilibrium constant Ke expression for the following 4 KO:(s)...
Use the following information to answer the next 2 questions. KCl(aq)+Se(s)+I2(s)+H2O(l)→K2SeO3(aq)+KI(aq)+HCl(aq) When the equation above is balanced using lowest whole number coefficients, the coefficient of KCl(aq) is I2(s) is K2SeO3(aq) is KI(aq) is Question 42 In the above equation Choose...(I₂(s) or Se(s)) is acting as the oxidizing agent by transferring ____of electrons.
2) A solution of I2 was standardized with ascorbic acid. The titration of a 10.00 mL aliquot of a stock solution made by dissolving 0.1050 g sample of pure ascorbic acid to a final volume of 100.00 mL required 25.32 mL of I2 to reach the starch end point a. What is the molarity of the iodine solution? b. How many mg ascorbic acid is required to react with 1.00 mL iodine solution?
During a titration experiment, a 24.8 ml sample of arsenic acid (It, AsO) of unknown concentrations analyzed. A total of 33.33 ml of 0.2500 M Ca(OH)is required to reach the endpoint. What is the concentration of the arsenic acid sample? 2 WAso,(aq) + 3 Ca(OH)2(aq) - Caz(Aso.)2(s) + 6H20 (1)
The amount of I−3(aq) in a solution can be determined by titration with a solution containing a known concentration of S2O2−3(aq) (thiosulfate ion). The determination is based on the net ionic equation 2S2O2−3(aq)+I−3(aq)⟶S4O2−6(aq)+3I−(aq) Given that it requires 27.7 mL of 0.440 M Na2S2O3(aq) to titrate a 15.0 mL sample of I−3(aq), calculate the molarity of I−3(aq) in the solution.