First distilled water was added to a test tube. Then methyl orange indicator was added. The HCl and NaOH.
In alkaline medium, methyl orange indicator gives yellow color. Assume that represents the yellow form of the indicator.
In acidic medium, methyl orange indicator gives red color. Assume that represents the red form of the indicator.
The equilibrium reacion is
The initial color is red. This is the color obtained when methyl orage is added to pure water.
1.
HCl is added
a.
Color remains red. No color change is observed.
b.
Equilibrium shifts to left, towards
This is because HCl gives protons. These protons acts as common ions and suppress the ionization of .
2.
NaOH is added
a.
Color changes from red to yellow.
b.
Equilibrium shifts to left, towards
This is because NaOH gives hydroxide ions. These hydroxide ions combines with protons to form water. In this way protons are removed from the solution. These protons acts as common ions and their removal increases the ionization of
First distilled water was added to a test tube. Then methyl orange indicator was added. The...
1. Methyl orange, HMO, is a common acid-base indicator. In solution it ionizes according to the equation: HMO(aq) = H(aq) + MO"(aq) red yellow If methyl orange is added to distilled water, the solution turns yellow. If a drop or two of 6 M HCl is added to the yellow solution, it turns red. If to that solution one adds a few drops of 6 M NaOH the color reverts to yellow a. Why does adding 6 M HCl to...
Section Name Experiment 2 Advance Study Assignment: Properties of Systems in Chemical Equilibrium 1. Methyl orange, HMO, is a common acid-base indicator. In solution it ionizes according to the equation: HMO(aq) H(aq) + MO (aq) red yellow If methyl orange is added to distilled water, the solution turns yellow. If a drop or two of 6 M HCl is added to the yellow solution, it turns red. If to that solution one adds a few drops of 6 M NaOH...
The equilibrium between the methyl orange indicator and indicator ion can be expressed in the following reaction: (CH3)2NHC6H4N=NC6H4SO3 +H2O (CH3)2NC6H4N=NC6H4SO3- + H3O+ Methyl Orange ((CH3)2NHC6H4N=NC6H4SO3 ) is red while the indicator ion ((CH3)2NC6H4N=NC6H4SO3-) is yellow-orange Describe the color changes on the addition of: HCl NaOH Interpret the hydrochloric acid addition change in terms of the methyl orange indicator and indicator ion equilibria and the Le Chatelier principle Interpret the sodium hydroxide addition change in terms of the methyl orange indicator...
Part I Color changes of Methyl Violet. We will study the following reaction: HMV (aq) + MV (aq) + H* (aq) yellow greenish-blue violet Step 1. Place about 4 mL of distilled water in a regular test tube. Add two drops of methyl violet indicator. Record the color of the solution. Violet Next, add drop by drop, add 6M HCI. This forces equilibrium to be shifted to the left or right-circle the right answer). Adding HCl changes color from to...
Weak acid-base indicator equilibria Step 1: Obtain a small test tube and add approximately 5mL water. Next, add 10 drops of a methyl violet indicator, and record the color of the solution. Step 2: Add ~4 drops of 6 M HCl to the solution, and record the color of the solution. (be careful when handling concentrated acids and bases) Step 3: Add 6 M NaOH until the color of the solution shifts back to its original color. Estimate the pH...
1. Interpret the hydrochloric acid addition change in terms of the methyl orange indicator and indicator ion equilibria and the Le Chatelier principle. Interpret the sodium hydroxide addition change in terms of the methyl orange indicator and indicator ion equilibria and the Le Chatelier principle Would you predict more color change would come if HCl or HC2H3O2 were added to the indicator?
2. Explain the effect upon the equilibrium, if any, for each of the substances added (sodium acetate, sodium hydroxide and hydrochloric acid). If you believe that the addition effects the position of the equilibrium, indicate whether the equilibrium shifts toward reactants or products and why. Adding sodium acetate: Adding sodium hydroxide: Adding hydrochloric acid: Data: Observation Test solution Initial Acetic acid + methyl orange А Acetic Acid + methyl orange + first NaC,H,O2 Acetic Acid + methyl orange + second...
I put 5 mL of water in a test tube with 3 drops of the indicator methyl orange. If I wanted my solution to become red in color, I should add 1 Select]
QUESTION 1 6 points Save Answer The purpose of an indicator in an acid-base titration is to indicate the of the titration. Use Table 10.2 for the following question. If an acidic solution is titrated with a basic solution and methyl violet is used as an indicator, the solution color will change from to QUESTION 2 3 points Save Answer The molarity of a solution prepared by dissolving 17.0 g of hydrochloric acid (HCI (aq) in 133 mL of water...
Adding acetate ion produces a change in the color of the indicator. Watch Video-le where a drop of methyl orange is added to each of two 3-mL samples of 0.1 M CH3COOH (acetic acid). The 1 M Na CH3COO (sodium acetate) is added a few drops at a time (with mixing) to one of the samples. The effect on the dissociation of acetic acid that is produced by adding sodium acetate is called the common ion effect. Specify the color...