Section: 3. Balance the following reactions based on the given method: (use the provided sheet for the balancing) Oxidation Number Method a) HNO3(aq) + C,H,O(1) + K,Cr,O,(aq) KNO,(aq) + C,H,0(1) + H,0(1) + Cr(NO,),(aq) >

Section: 3. Balance the following reactions based on the given method: (use the provided sheet for the balancing) Oxidation Number Method a) HNO3(aq) + C,H,O(1) + K,Cr,O,(aq) KNO,(aq) + C,H,0(1) + H,0(1) + Cr(NO,),(aq) >

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...

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The quantity of Cl^- in a municipal water supply is determined by titrating the sample with Ag^+. The precipitation reaction taking place during the titration is Ag^+ (aq) + Cl^- (aq) > AgCl (s). a) How many grams of chloride ion are in a sample of the water if 20.2 mL 0f 0.100M Ag^+ is needed to react with all tghe chloride in the sample? b) if the sample has a mass of 10.0g, what percentage of Cl^- does it contain?
18. In a common medical laboratory determination of the concentration of free chloride ion in blood serum, a serum sample is titrated with a Hg(NO;), solution. 2c1 (aq) + Hg(NO,)2(aq) → 2NO, (aq) + HgCl,(s) What is the Cl concentration in a 0.25-ml sample of normal serum that requires 1.46 ml of .000825 M Hg(NO3)2(aq) to reach the end point?
A sample of iron ore is dissolved in acid, and the iron is converted to Fe2+ (iron II). The sample is then titrated with 57.30 mL of 0.03240 M MnO4- solution. The net ionic equation for the oxidation-reduction that occurs during titration is as follows: Mn04-(aq) + 5FE2+(aq) + 8H+(aq) --> Mn2+(aq) + 5FE3+(aq) + 4H2O(I) How many moles of Fe2+ were in the sample? O 2.269 x 10^-2 mol (2.269E-2 mol) O 7.563 x 10^-3 mol (7.563E-3 mol) O 9295.1 mol O 5 mol O 9.285 x 10^-3 mol (9.285E-3 mol)
Be sure to specify states such as (aq) or (s). If a box is not needed leave it blank. When aqueous solutions of sodium phosphate and calcium iodide are combined, solid calcium phosphate and a solution of sodium iodide are formed. The net ionic equation for this reaction is: + +
Does a reaction occur when aqueous solutions of sodium carbonate and manganese(II) iodide are combined? O yes no If a reaction does occur, write the net ionic equation. (Use the solubility rules provided in the OWL Preparation Page to determine the solubility of compounds. Be sure to specify states such as (aq) or (s). If a box is not needed leave it blank.) + →
Write the net ionic equation for the following molecular equation. MnBr2 (aq) + (NH,)2CO3 (aq) → MnCO3 (8) + 2NH,Br(aq) (Use the lowest possible coefficients. Be sure to specify states such as (aqg) or (s). If a box is not needed, leave it blank.)
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?
2. Specify which of the following are oxidation-reduction reactions and identify the substance being oxidized and the substance being reduced, when appropriate. a. Cu (s) + 2 Ag (aq) + 2 Ag (s) + Cu²+ (aq) b. HCl (g) + NH, (g) → NH,Cl (s) c. SiCl, (l) + 2 H₂O (1)→ 4 HCl (aq) + SiO₂ (s) d. SiCl, (l) +2 Mg (s) 2 MgCl, (s) + Si (s) e. Al(OH), (aq) → AlO, (aq) + 2 H₂O (1) f. CH, (g) +H,O (g) + CO (g) + 3H, (g) g. Zn (s) + 2 HCl (aq) → ZnCl, (aq) + H₂(g) h. 2H* (aq) + 2 CrO, (aq) + Cr₂O," + H₂O (1)
Balance this equation Mn²+ (aq) +O,(g) Mn0,(s) in basic solution.
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Pls help with all the sub parts. Thanks!
Which one of the following is not a redox reaction? O Cl2(g) + 2KBr(aq)Br2() + 2KCI(aq) O Zn(s) + H2SO4laq) → ZnSO4(aq) + H2(g) 2H2(g) + O2(g) → 2H20() O 6FESO4(aq) + K2Cr207(aq)+ 7H2SO4(aq) - Cr2(SO4)3(aq) + 3FE2(SO4)3(aq)+ K2SO4(aq) + 7H20() H20() + NH3(g) → NH4*(aq) + OH (aq) Previous Page Next Page