A chemistry class is investigating contamination in different sources of water and discovers that one source of water may have some lead ions (Pb²+) in it. The students decide to perform an experiment to test for the presence of lead. The students take a sample of water to the lab and add solid NaI, which will precipitate any lead ions according to the following equation. 2 Nal(aq) + Pb²+ (aq) → PbI₂ (s) +2 Na+ (aq) If a 2000.0 mL sample of water has a lead ion concentration of 2.00 x 10-5 M and excess NaI is added to the sample, what is the mass of PbI₂ collected at the end of the experiment? A 0.0041 gram B с D 0.0083 gram 0.0092 gram 0.0184 gram

A chemistry class is investigating contamination in different sources of water and discovers that one source of water may have some lead ions (Pb²+) in it. The students decide to perform an experiment to test for the presence of lead. The students take a sample of water to the lab and add solid NaI, which will precipitate any lead ions according to the following equation. 2 Nal(aq) + Pb²+ (aq) → PbI₂ (s) +2 Na+ (aq) If a 2000.0 mL sample of water has a lead ion concentration of 2.00 x 10-5 M and excess NaI is added to the sample, what is the mass of PbI₂ collected at the end of the experiment? A 0.0041 gram B с D 0.0083 gram 0.0092 gram 0.0184 gram

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Predicting the reactants of a neutralization reaction Predict the reactants of this chemical reaction. That is, fill in the left side of the chemical equation. Be sure the equation you submit is balanced. (You can edit both sides of the equation to balance it, if you need to.) Note: you are writing the molecular, and not the net ionic equation. → KBr(aq) + H₂O(1) × ロ→ロ Ś ? olo 18 Ar AR OF efloor
Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of K 2S and Fe(NO 3) 2 are mixed.
A quality control technician needs to determine the percentage Arsenic (As) in particular pesticide.The pesticide is dissolved and all of the arsenic present is converted to arsenate ions (AsO43-). Then the amount of AsO43- is determined by titrating with a solution containing silver ions (Ag+). The silver reacts with the arsenate according to the net ionic equations: 3 Ag+ + AsO43- → Ag3AsO4 When a 1.22 g sample of pesticide was analyzed this way, it required 25.0 mL of 0.102 M Ag+ solution to precipitate all of the AsO43-. What was the mass percentage of arsenic in the pesticide?
Chemistry A student weighs out a 9.08 g sample of ZnSO4, transfers it to a 250. mL volumetric flask, adds enough water to dissolve it and then adds water to the 250. mL tick mark. What is the molarity of zinc sulfate in the resulting solution? Molarity = M
A student combined CuCl2 (aq) and Na (s). The student observed a color change, thus a reaction occurred. Write the balanced molecular equation for this reaction showing coefficients and phase labels. Write the complete ionic equation for this reaction. Write the net ionic equation for this reaction. Assign oxidation numbers to the reactants and products in the net ionic equation. Which reactant, CuCl2 (aq) or Na (s), got oxidized? Which reactant, CuCl2 (aq) or Na (s), got reduced? Which reactant, CuCl2 (aq) or Na (s), is the oxidizing agent? Which reactant, CuCl2 (aq) or Na (s), is the reducing agent?
1801 2. If the density of a 2.50 M HCl solution is 1.248 g/cm3, what mass of HCL solution is needed to react with 82.07 mL of 1.54 M Mg(OH)2? The chemical reaction is: HCI + Mg(OH), → MgCl, + H,O
Three acid samples are prepared for titration by 0.03 M NaOH: Sample 1 is prepared by dissolving 0.03 mol of HCl in 20 mL of water. Sample 2 is prepared by dissolving 0.03 mol of HCl in 30 mL of water. Sample 3 is prepared by dissolving 0.03 mol of HCl in 40 mL of water. a Without performing a formal calculation, compare the concentrations of the three acid samples (rank them from highest to lowest). O3>2>1 O1>3> 2 O3>1> 2 O2>1>3 O1>2>3 O2>3>1 Submit Submit Answer Try Another Version 6 item attempts remaining
The balanced equation for the reaction of aqueous Pb(ClO3)2 with aqueous Nal is shown below. Pb(ClO3)2(aq) + 2 NaI(aq) → PbI2 (s) + 2 NaClO3(aq) What mass of precipitate will form if 1.50 L of excess Pb(ClO3)2 is mixed with 0.400 L of 0.100 M NaI? Assume 100% yield and neglect the slight solubility of PbI2.
Give the net ionic reaction equation for the following reaction: CuCl 2 (aq) + 2 NaOH (aq) → Cu(OH) 2 (s) + 2 NaCl (aq)
Write a balanced chemical equation for this combination reaction, having correctly identified the product as Ca(OH)2 (aq)
Write the reaction that occurs when lithium hydroxide, LiOH, is mixed with nitric acid, HNO3.
2. One way to determine the concentration of lead (II) in water is by precipitating it via titration using potassium iodide forming the insoluble lead (II) iodide: Pb²+ (aq) + 2Kl(aq) → Pbl2(s) + 2K+ (aq) What is the concentration (in M) of lead (II) in a 250 mL sample if it consumed 33.2 mL of 2.5 M potassium iodide solution?