5.587 grams of Pb(NO3)2 are reacted with 5.587 grams of Na2S, and the resulting precipitate is collected by filtering the solution.   Pb(NO3)2 (aq)   +   Na2S (aq)   →   2NaNO3(aq)   +   PbS (s) The mass of the watch glass was 27.419 g, the mass of the filter paper was 0.284 g, and the combined mass of the dry product, watch glass, and filter paper was 30.513 grams. Calculate the percent yield of the precipitate.

Calculate the number of milliliters of 0.479 M Ba(OH)2 required to precipitate all of the Cr³+ ions in 156 mL of 0.725 M CrIs solution as Cr(OH)3. The equation for the reaction is: 2Crls (aq) + 3Ba(OH)2 (aq) → 2Cr(OH)s (8) + 3Bal, (aq) ml. Volume= Submit Answer Retry Entire Group 9 more group attempts remaining

Calculate the number of milliliters of 0.689 M NaOH required to precipitate all of the A1³+ ions in 163 mL of 0.784 M Al2(SO4)3 solution as Al(OH)3. The equation for the reaction is: Al2(SO4)3 (aq) + 6NaOH(aq) → 2Al(OH)3 (s) + 3Na2SO4 (aq) Volume = | mL

Jake carried out three titrations to determine the concentration of unknown nitric acid (HNO3) using 0.1050 M NaOH. He titrated 100.0 mL of the nitric acid sample and obtained the following volumes of NaOH: 20.56, 20.48, and 20.52 mL. The acid-base reaction occurring is NaOH (aq) + HNO3(aq) →→ NaNO3(aq) + H2O(l) Determine the concentration of the acid; report the average molarity with standard deviation. Pay attention to the number of significant figures on the mean and the number of decimal places on the standard deviation.

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 2 S,03 (aq) + I5(aq) → S,0 (aq) + 31(aq) Given that it requires 30.1 mL of 0.310 M Na, S,O, (aq) to titrate a 15.0 mL sample of I, (aq), calculate the molarity of I, (aq) in the solution. [I]= Question Source: MRG - General Chemistry Publisher: University Science Books

A sample of iron ore is dissolved in acid, and the iron is converted to Fe2*. The sample is then titrated with 47.20 mL of 0.02240 M MnO4 solution. The oxidation-reduction reaction that occurs during titration is as follows: MnO4(aq) + 5FE2*(aq) + 8H*(aq) → Mn²*(aq) + 5FE3* (aq) + 4H2O How many moles of MnO4¯ were added to the solution? Blank 1 2+ How many moles of Fe were in the sample? Blank 2 How many grams of iron were in the sample? Blank 3 If the sample had a mass of 0.8890 g, what is the percentage of iron in the sample? Blank 4 Blank 1 Add your answer Blank 2 Add your answer Blank 3 Add your answer Blank 4 Add your answer

An iron ore sample weighing 0.9174 g is dissolved in HCl(aq), and the iron is obtained as Fe2+(aq). This solution is then titrated with 34.62 mL of 5.016×10−2 M K2Cr2O7(aq)6Fe2+ + 14H+ + Cr2O2−7  → 6Fe3+ + 2Cr3+ + 7H2O What is the mass percent Fe in the ore sample?

A 57.0 mL sample of a 0.118 M potassium sulfate solution is mixed with 38.0 mL of a 0.122 M lead(II)acetate solution and the following precipitation reaction occurs: K2SO4(aq)+Pb(C2H3O2)2(aq)→2KC2H3O2(aq)+PbSO4(s) The solid PbSO4 is collected, dried, and found to have a mass of 1.01 g. Determine the limiting reactant, the theoretical yield, and the percent yield.

6 a b U d [Tutorial: Titration stoichiometry] This question will walk you through the steps of calculating the volume of titrant required to reach the endpoint based on the volume and concentration of analyte. Consider the standardization of NaOH by titration with C,H,O, according to the following chemical reaction: 3 NaOH(aq) + C,H,O,(aq) = Na,C,H,O,(aq) + 3 H₂O(l) Step 1: Evaluate the question. How many moles of aqueous sodium hydroxide (NaOH) will react to completely neutralize one mole of aqueous citric acid (C,H,O,)? Which equation will be most helpful for solving this problem? Calculate the volume in mL of a 0.200 M NaOH solution needed to neutralize 345 mL of 0.033 MC,H,O, standard solution. Based on the fact that NaOH is a strong base and C,H,O, is a weak acid, how would you describe the pH of the solution at the endpoint, where moles of base = 3 times the moles of acid?

Fe(lI) can be precipitated from a slightly basic aqueous solution by bubbling oxygen through the solution, which converts Fe(ll) to insoluble Fe(lI): 4Fe(OH)*(aq) +40H¯(aq)+O2(g) +2H,0(1) → 4Fe(OH),(s) How many grams of O2 are consumed to precipitate all of the iron in 50.0 mL of 0.0950 MFe(II)?