In the laboratory you dissolve 20.2 g of chromium(II) nitrate in a volumetric flask and add water to a total volume of 375 mL.What is the molarity of he solution?M.What is the concentration of the chromium(I) cation?M.What is the concentration of the nitrate anion?M.

1. Molarity (M) : Number of moles of solute present in 1 litre solution M = n / V (in L)…

Answered: In the laboratory you dissolve 20.2 g…

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter15: Solutions

Section: Chapter Questions

Problem 54QAP

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A 25-mL sample of 0.50 M NaOH is combined with a 75-mL sample of 0.50 M NaOH. What is the concentration of the resulting NaOH solution?
Two liters of a 1.5 M solution of sodium hydroxide are needed for a laboratory experiment. A stock solution of 5.0 M NaOH is available. How is the desired solution prepared?
onsider a sugar solution (solution A) with concentration x. You pour one-third of this solution into a beaker, and add an uivalent volume of water (solution B). What is the ratio of sugar in solutions A and B? Compare the volumes of solutions A and B. m>c. What is the ratio of the concentrations of sugar in solutions A and 13?
A large beaker contains 1.50 L of a 2.00 M iron(III) chloride solution. How many moles of iron ions are in the solution? How many moles of chloride ions are in the solution? You now add 0.500 L of a 4.00 M lead(II) nitrate solution to the beaker. Determine the mass of solid product formed (in grams).
Vitamin C has the formula C6H8O6. Besides being an acid, it is a reducing agent. One method for determining the amount of vitamin C in a sample is to titrate it with a solution of bromine, Br2, an oxidizing agent. C6H8O6(aq) + Br2(aq) 2 HBr(aq) + C6H6O6(aq) A 1.00-g "chewable" vitamin C tablet requires 27.85 ml of 0.102 M Br2 for titration to the equivalence point. What is the mass of vitamin C in the tablet?
Insulin is a hormone that controls the use of glucose in the body. How many moles of insulin are required to make up 28 mL of 0.0048 M insulin solution?
The concentration of a certain sodium hydroxide solution was determined by using the solution to titrate a sample of potassium hydrogen phthalate (abbreviated as KHP). KHP is an acid with one acidic hydrogen and a molar mass of 204.22 g/mol. In the titration, 34.67 mL of the sodium hydroxide solution was required to react with 0.1082 g KHP. Calculate the molarity of the sodium hydroxide.
A 50.0-mL volume of AgNO3 solution contains 0.0345 mol AgNO3 (silver nitrate). What is the molarity of the solution?
In a common medical laboratory determination of the concentration of free chloride ion in blood serum, a serum sample is titrated with a Hg( NO3)2 solution. 2Cl(aq)+Hg( NO3)2(aq)2NO3(aq)+HgCl2(s) What is the CF concentration in a 0.25-mL sample of normal serum that requires 1.46 mL of 8.25104M Hg( HO3)2(aq) to reach the end point?
The unknown acid H2X can be neutralized completely by OH according to the following (unbalanced) equation: H2X(aq)+OH(aq)X2(aq)+H2O(l) The ion formed as a product, X2, was shown to have 36 total electrons. What is element X? Propose a name for H2X. To completely neutralize a sample of H2X, 35.6 mL of 0.175 M OH solution was required. What was the mass of the H2X sample used?

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