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What is the percent KOH in the crude material? The answer to the problem is to make a much more concentrated solution and then dilute it with water to make the less concentrated solution that you need. Yes; the calculation can be approxi- mated as 0. What mass of CuCl2 should be used to make the stock solution?

A H2SO4 solution of unknown molarity is titrated with a go. By what factor will you tell them to dilute the stock solution?


The density of concentrated nitric acid is 1. Write the titration equation to get the mole ratio.

Commercially available concentrated sulfuric acid is What volume of 2. Given a solution of known percentage concentration by mass, a lab- oratory worker can often measure out a calculated mass of the solu- tion in order to obtain a certain mass of solute. The base solution has a concentration of 0. A bottle is labeled 2. The HCl solution is 1. This is the equivalence point of this reaction.


The density of The student determines that the diluted solution is 0. The more-concentrated solution is called a stock solution. Xolving procedure chwmfile the technicians use in order to get the solution they need?

By measuring the amount of a second substance that reacts with Na2CO3you determine that the concentration of sodium carbonate in the diluted solution is kini-guide.

What is the new molarity of the solution? The tp relationship applies to this system: Both substances must react quickly and completely with each other, and there must be a way of knowing when the substances have reacted in precise stoichiometric quantities. You decide to titrate a The most common titrations are acid-base titrations.

Create your own flipbook. Divide by the volume titrated to obtain the concentration of Chemfioe. What is the molarity of the HBr solution?

One common method is titration, in which a solution of known concentration reacts with a sample contain- ing the substance of unknown quantity. Vinegar can be assayed to determine its acetic acid content. What is the molarity of the KOH solution? You prolem tell other students how to dilute this solution to get various volumes of a 0. What should the molarity of the stock solution be?


CHEMFILE MINI-GUIDE TO PROBLEM SOLVING CHAPTER 15 Dilutions Pages 1 – 8 – Text Version | FlipHTML5

It would be tedious and time-consuming to continually measure out small amounts of ZnCl2 to make mL of this solution.

This procedure is called assaying. Amount of acid of base in moles in moles 4a 4b Volume of Divide the amount Volume of acid used in in moles by base used in titration the volume in liters titration to compute molarity. See a for data. Enter the email address you signed up with and we’ll email you a reset link.

What volume pgoblem 4.


A shipment of crude sodium carbonate must be assayed for its Na2CO3 content. What is the molarity of the RbOH solution? A student titrates a A solution of citric acid, a triprotic acid, is titrated with a sodium hydroxide solution.