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I.Chromate-Dichromate Equilibrium 2 CrO42-(aq) + 2 H+ (aq) Cr2072-(aq) + H2O Yellow orange In a clean dry test tube place about 2 mL of 0.1 M K2Cr04, a clear yellow solution. Add drops of 3M H2SO4, sulfuric acid, until the orange dichromate ion has been formed. (CAUTIO this solution can cause burns when in it comes into contact with skin) Then add drons of 6M NaOH sodium hydroxide until the vellow chromate ion has been reform

I.Chromate-Dichromate Equilibrium 2 CrO42-(aq) + 2 H+ (aq) Cr2072-(aq) + H2O Yellow orange In a clean dry test tube place about 2 mL of 0.1 M K2Cr04, a clear yellow solution. Add drops of 3M H2SO4, sulfuric acid, until the orange dichromate ion has been formed. (CAUTIO this solution can cause burns when in it comes into contact with skin) Then add drons of 6M NaOH sodium hydroxide until the vellow chromate ion has been reform

Chemistry
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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d.Explain the formation and dissolving of the precipitate with the BaC12 solution using Le Chatelier's Principle. How was the ppt formed in the 1st place, what was the cffect of adding OH-, and what was the effect of adding the H+

1.Chromate- Dichromate Equilibrium 2 CrO42-(aq) + 2 H+ (aq) → Cr2072-(aq)+ H2O Yellow orange In a clean dry test tube place about 2 mL of 0.I M K2CrO4, a clear yellow solution. Add drops of 3M H2SO4, sulfuric acid, until the orange dichromate ion has been formed. (CAUTION: this solution can cause burns when in it comes into contact with skin) Then add drops of 6M NAOH, sodium hydroxide, until the yellow chromate ion has been reforms. (CAUTION: this solution can cause burns when in it comes into contact with skin) Gently shake or stir the solutions during the reactions to keep the solutions well mixed. Repeat the addition of sulfuric acid. Record all observations. In a clean test tube place about a few mL of fresh chromate (yellow) solution. Add a 1 drop of BaCl2 (aq) and mix. Record the results. Add drops of 6 M NAOH until all of the precipitate disappears and the color changes. Record observations. •Repeat the addition of 3 M sulfuric acid and record observations. POUR THE CONTENTS OF THE TEST TUBE IN THE DESIGNATED WASTE CONTAINER. 2. Precipitation Equilibrium (Acid-Base Effects). Co2+ (aq) + 2 OH-(aq) Co (OH) 2(s) Pink blue
Transcribed Image Text:1.Chromate- Dichromate Equilibrium 2 CrO42-(aq) + 2 H+ (aq) → Cr2072-(aq)+ H2O Yellow orange In a clean dry test tube place about 2 mL of 0.I M K2CrO4, a clear yellow solution. Add drops of 3M H2SO4, sulfuric acid, until the orange dichromate ion has been formed. (CAUTION: this solution can cause burns when in it comes into contact with skin) Then add drops of 6M NAOH, sodium hydroxide, until the yellow chromate ion has been reforms. (CAUTION: this solution can cause burns when in it comes into contact with skin) Gently shake or stir the solutions during the reactions to keep the solutions well mixed. Repeat the addition of sulfuric acid. Record all observations. In a clean test tube place about a few mL of fresh chromate (yellow) solution. Add a 1 drop of BaCl2 (aq) and mix. Record the results. Add drops of 6 M NAOH until all of the precipitate disappears and the color changes. Record observations. •Repeat the addition of 3 M sulfuric acid and record observations. POUR THE CONTENTS OF THE TEST TUBE IN THE DESIGNATED WASTE CONTAINER. 2. Precipitation Equilibrium (Acid-Base Effects). Co2+ (aq) + 2 OH-(aq) Co (OH) 2(s) Pink blue
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