The amount of I, (aq) in a solution can be determined by titration with a solution containing a known concentration of S,0, (aq) (thiosulfate ion). The determination is based on the net ionic equation 2s,0, (aq) + 15 (aq) S,0, (aq) + 31-(aq) Given that it requires 38.6 mL of 0.470 M Na, S,O,(aq) to titrate a 10.0 mL sample of I, (aq), calculate the molarity of I, (aq) in the solution. [5] = M %3D

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Calculate the number of milliliters of 0.779 M KOH required to precipitate all of the Pb²* ions in 122 mL of 0.541 M Pb(NO3)2 solution as Pb(OH)2. The equation for the reaction is: Pb(NO3)2(aq) + 2KOH(aq) –→Pb(OH)2(s) + 2KNO3(aq) mL KOH

A chemistry student needs to standardize a fresh solution of sodium hydroxide. He carefully weighs out 626. mg of oxalic acid (H,C,04), a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in 250. mL of distilled water. The student then titrates the oxalic acid solution with his sodium hydroxide solution. When the titration reaches the equivalence point, the student finds he has used 145.9 mL of sodium hydroxide solution. Calculate the molarity of the student's sodium hydroxide solution. Round your answer to 3 significant digits. MAR 3. ... MacBook 44 DI DD 000 000 F10 F9 F8

Balance the following equation, which represents a reaction that occurs in basic aque- ous solution: Ag(s) + HS (aq) + CrO? (aq) → Ag.S(s) + Cr (OH), (s)

A sample of a chloride salt weighing 484.6 mg is titrated with AgNO3 using K2CrO4 as indicator. To reach the end point a 52.3 mL of 0.1475 M of AgNO3 solution is required.    The net ionic equation for the reaction of titration is: Ag+ (aq) + Cℓ- (aq) → AgCℓ (s)    How many moles of Ag+ (aq) ions are used to reach the end point?    How many moles of Cℓ- (aq) have reacted in the titration?    How many grams of chloride are present in the sample?   What is the mass percent of chloride in the sample?

A certain brand of vinegar is analyzed for its acetic acid content by titration with 0.2 moles/liter NaOH. The neutralization reaction is:CH3COOH(aq) + NaOH(aq) --> NaCH3COO(aq) + H2O(l)Here 6ml of the vinegar required 45 ml of the 0.2 moles/liter NaOH to be neutralized. Assume that the density of the vinegar is 1.15 g/ml. What is the % by mass of CH3COOH in the vinegar

A chemistry student needs to standardize a fresh solution of sodium hydroxide. She carefully weighs out 287. mg of oxalic acid (H, C,04), a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in 250. mL of distilled water. The student then titrates the oxalic acid solution with her sodium hydroxide solution. When the titration reaches the equivalence point, the student finds she has used 75.9 mL of sodium hydroxide solution. Calculate the molarity of the student's sodium hydroxide solution. Be sure your answer has the correct number of significant digits. ||M

Lead(II) nitrate and ammonium iodide react to form lead(II) iodide and ammonium nitrate according to the reaction Pb(NO,),(aq) + 2 NH,I(aq) Pbl, (s) + 2 NH,NO,(aq) What volume of a 0.130 M NH¼I solution is required to react with 507 mL of a 0.180 M Pb(NO3)2 solution? volume: 1404 mL How many moles of PbI2 are formed from this reaction? 0.009126 moles: mol PbI2 Incorrect

2. What is the concentration of NaCl in a solution if titration of 15.00 mL of the solution with 0.2503 M AgNO, requires 20.22 mL of the AgNO, solution to reach the end point? AGNO, (aq) + NaCl (aq) – AgCI (s) + NaNO; (aq) 3 3.