ers before submitti nestion 30 The titration of 25.0 mL of an unknown concentration of HCI solution requires 139.9 mL of 0.23 M NAOH solution. What is the concentration of the HCI solution (in Molarity)? (Hint- Carefully balance the equation first!!) Next

What is the precipitate upon mixing lead(II) nitrate and potassium iodide? O KNO: KI Pbla none When properly balanced, the sum of the balancing coefficients for the reaction of lead(II) nitrate and potassium iodide is 10 O 12 O none of these

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You perform a titration on 11.35 mL of an HCl solution of unknown concentration. It requires 75.25 mL of 0.285 M NaOH to turn slightly pink. What is the concentration of the HCl (in M)?

Name: Date: b) How many grams of AgCl are precipitated? Prelaboratory Assignment: Analysis of an Unknown Chloride 1.) A sample containing 0.175 g of Cl- is dissolved in 50 mL of deionized H2O. The solution is titrated to the equivalence point with a AgNO3 solution. The final volume of the titrated sample is 75 mL a) What is the concentration of the AgNO3 solution? Section: 2.) A student wishes to determine the mass percentage of barium in a 2.016 g sample. The student titrated the sample with 20 mL of 0.20 M H2SO4, producing a BaSO4 precipitate. a) How many moles of BaSO4 were formed in the titration? b) What was the mass of barium present in the original sample? c) What was the mass percent of barium in the original sample? 3) An unknown sample weighing 0.2583 g is titrated to the end point with 47.28 mL of a 0.10 M AgNO3 solution. What is the weight percent of Cl- in the sample?

General Chemistry 4th Edition McQuarrie • Rock Gallogly University Science Books presented by Macmillan Learning A solution contains 0.0130 M Pb²+ (aq) and 0.0130 M Sr2 +(aq). If you add SO (aq), what will be the concentration of Pb2 +(aq) when SrSO,(s) begins to precipitate? [Pb**) = M question 3odrce: McQuarrie, Rock, And Gallogly 4e - General Chemsitry | Publisher: University Science Books

Resc Consider the neutralization reaction 2 HNO, (aq) + Ba(OH),(aq) –→ 2 H,O(1) + Ba(NO,),(aq) A 0.110 L sample of an unknown HNO, solution required 27.3 mL of 0.100 M Ba(OH), for complete neutralization. What is the concentration of the HNO, solution? concentration: M

EM EM 101 App 7-5 ollowing combinations would NOT form a precipitate in aqueous solution? -) Sr(NO:)2 and NaOH )AGNO3 and KBr Zn(C:H3O2)2 and Na:S

Group I Cations of 6 M HCI; centrifuge for ~1 minute. Decant the solution and add an additional one or two drops of 6 M HCI; if no additional precipitate forms, the precipitation is complete. If it was incomplete, centrifuge to obtain the additional solid; then decant the liquid, add 1 or 2 drops of 6 M HCI, and repeat the procedure until no precipitate forms. Discard the supernatant into the appropriate waste container or keep for later experiments if your instructor so indicates. Add 1.5 mL of cold deionized or distilled water to the precipitate to wash; agitate, centrifuge, and discard the water to the appropriate waste container. Repeat the wash procedure. The solid contains Pb2*, Ag*, and/or Hg22*. Step 2. Separation of Pb2*. Add 1 mL of boiling water to the solid from step 1. Agitate, centrifuge, and decant the liquid. Repeat the extraction, combining the supernatant. The liquid should contain Pb?* if any is present. Step 3. Testing for Pb2*. Add 2 or 3 drops of 0.2 M K2CRO4…

A 0.398 g sample of KHP will be titrated with a NaOH solution with an assumed concentration of 0.100 M. Calculate the volume of NaOH that should neutralize the KHP sample. volume: mL