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Ch.4 - Reactions in Aqueous Solution

Chapter 4, Problem 128

What is the molar concentration of As(III) in a solution if 22.35 mL of 0.100 M KBrO3 is needed for complete reaction with 50.00 mL of the As(III) solution? The balanced equation is:

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Hey everyone, we're asked to calculate the molar concentration of Hydro chaotic solution. If 22.4 ml of 0.915 rubidium hydroxide was required to completely neutralize our acid. So first let's go ahead and write our reaction. We have our hydro biotic solution and we react this with our rubidium hydroxide. Since we have an acid based reaction, we're going to end up with rubidium, I died plus water and checking our reaction out, we can see that everything is balanced so we can go ahead and move on with our question. Starting off with our 22.4 ml of rubidium hydroxide. Since this is what was required to neutralize our asset, We're going to convert this into leaders and we know that 10 to the 3rd mill leaders is equivalent to one leader And we were told that our polarity of rubidium hydroxide was 0. moles of rubidium hydroxide per one leader. Next looking at our multiple ratios between rubidium hydroxide and our hydra idiotic acid, We see that we have a 1-1 ratio And this will get us to a value of 0. 96 mol of hydro ionic acid. Now to calculate our polarity we can go ahead and take our 0.020496 mol of hydrochloric acid. And we can divide this by our 51.4 milliliters. And since we want this in leaders for polarity, we're going to use our dimensional analysis and we know that we have 10 to the third middle leaders per one leader. And this will get us to a value of 0. Mueller. And this is our final answer. So I hope this made sense and let us know if you have any questions.
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How many milliliters of 0.250 M Na2S2O3 solution is needed for complete reaction with 2.486 g of I2 according to the equation in Problem 4.124?
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Dichromate ion, Cr2O7 2-, reacts with aqueous iron(II) ion in acidic solution according to the balanced equation What is the concentration of Fe2+ if 46.99 mL of 0.2004 M K2Cr2O7 is needed to titrate 50.00 mL of the Fe2+ solution?
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A volume of 18.72 mL of 0.1500 M K2Cr2O7 solution was required to titrate a sample of FeSO4 according to the equation in Problem 4.126. What is the mass of the sample?
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Standardized solutions of KBrO3 are frequently used in redox titrations. The necessary solution can be made by dissolving KBrO3 in water and then titrating it with an As(III) solution. What is the molar concentration of a KBrO3 solution if 28.55 mL of the solution is needed to titrate 1.550 g of As2O3? See Problem 4.128 for the balanced equation. (As2O3 dissolves in aqueous acid solution to yield H3AsO3: As2O3 + 3 H2OS 2 H3AsO3.)
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The metal content of iron in ores can be determined by a redox procedure in which the sample is first oxidized with Br2 to convert all the iron to Fe3+ and then titrated with Sn2+ to reduce the Fe3+ to Fe2+. The balanced equation is: What is the mass percent Fe in a 0.1875 g sample of ore if 13.28 mL of a 0.1015 M Sn2+ solution is needed to titrate the Fe3+?
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Textbook Question
The concentration of the Sn2+ solution used in Problem 4.130 can be found by letting it react with a known amount of Fe2+. What is the molar concentration of an Sn2+ solution if 23.84 mL is required for complete reaction with 1.4855 g of Fe2O3?
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