Question

For:   X → Z   X is green in aqueous solution, Z is colorless in aqueous solution...

For:   X → Z  

X is green in aqueous solution, Z is colorless in aqueous solution

Given the following:

Test #              grams X (molar mass = 40.00)           the volume of g X is negligible to total volume

1                                0.100

2                                0.200

solvent A

Test #              ml water

1                    20.00

2                    20.00

Solvent A and grams of X were mixed and the time for the green color to disappear was recorded

Calculate the [X] for Test 2 (remember the brackets mean concentration in this case Molarity)

A. 1.25 x 10-1
B. 5.00 x 10-3
C. 2.50 x 10-1
D. none of these

Homework Answers

Answer #2

The correct answer is option - C ( 2.5*10-1 )

answered by: anonymous
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Substances X2, Y2, and Z2 can all act as oxidizing agents. In solution X2 is green,...
Substances X2, Y2, and Z2 can all act as oxidizing agents. In solution X2 is green, Y2 is yellow, and Z2 is red. In the reactions in which they participate, they are reduced to X–, Y–, and Z– ions, all of which are colorless. A solution of X2 is mixed with one containing Y– ions. The color changes from green to yellow. a.         Write the net equation for the reaction. b.         Which species is oxidized? c.         Which species is the...
1. You need to make an aqueous solution of 0.241 M zinc bromide for an experiment...
1. You need to make an aqueous solution of 0.241 M zinc bromide for an experiment in lab, using a 300 mL volumetric flask. How much solid zinc bromide should you add? 2.How many milliliters of an aqueous solution of 0.132 M calcium chloride is needed to obtain 8.00 grams of the salt? 1. In the laboratory you dissolve 22.3 g of silver nitrate in a volumetric flask and add water to a total volume of 250 mL. What is...
Q. When a pink aqueous solution of potassium permanganate, faintly acidified with dilute sulfuric acid was...
Q. When a pink aqueous solution of potassium permanganate, faintly acidified with dilute sulfuric acid was treated with 10% aq. hydrogen peroxide, the reaction took place with the evolution of gas bubbles, and the pink solution was turned colorless. Further chemical analysis revealed that the evolved gas was oxygen, and the resulting solution contains potassium sulfate and manganese (II) sulfate; water was also formed during the same reaction. Please answer the followings: 1) Write down the balanced chemical equation for...
1. Assuming a negligible change in volume, how many moles of H3O+ or OH– must you...
1. Assuming a negligible change in volume, how many moles of H3O+ or OH– must you add per litre to an acidic solution to adjust its pH from 5.80 to 6.25? (A) 1.58 x 10–6 mol H3O+ (B) 2.14 x 10–6 mol OH– (C) 1.02 x 10–6 mol H3O+ (D) 1.02 x 10–6 mol OH– (E) 2.14 x 10–4 mol H3O+ 2.. A buffer is prepared by mixing 100.0 mL of a 0.100 mol L–1 CH3COOH solution with a 0.200...
1.) An aqueous solution contains 0.23 M hydrofluoric acid. One Liter of this solution could be...
1.) An aqueous solution contains 0.23 M hydrofluoric acid. One Liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant as each substance is added.) 0.12 mol HClO4 0.23 mol KNO3 0.24 mol HClO4 0.24 mol KF 0.117 mol NaOH 2.) An aqueous solution contains 0.34 M ammonia. One liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant as...
an aqueous solution of Ba(OH)2 by pipetting 25.00 mL of 0.0970 M Ba(NO3)2 into an Erlenmeyer...
an aqueous solution of Ba(OH)2 by pipetting 25.00 mL of 0.0970 M Ba(NO3)2 into an Erlenmeyer flask and that contains 25.00 mL of 0.105 M KOH. a) Calculate the molar concentrations of Ba2+(aq) and OH1-(aq) in their 50.00 mL solution. b) Use the molar concentrations of Ba2+(aq) and OH1-(aq) as determined above and the Ksp to show why a precipitate does not form. You must include a calculation as part of your answer. The value of Ksp for Ba(OH)2, is...
1. Isopropyl alcohol is mixed with water to produce a 35.0% (v/v) alcohol solution. How many...
1. Isopropyl alcohol is mixed with water to produce a 35.0% (v/v) alcohol solution. How many milliliters of each component are present in 745 mL of this solution? (Assume that volumes are additive.) 1A- _____ mL alcohol 1B-_____ mL water 2. Calculate the volume percent of solute in the following solutions. 2A- 16.9 mL of methyl alcohol in enough water to give 547 mL of solution. _____% 2B- 68.1 mL of ethylene glycol in enough water to give 229 mL...
QUESTION 3 Calculate the pH for an aqueous solution that contains 2.15 x 10-4 M hydroxide...
QUESTION 3 Calculate the pH for an aqueous solution that contains 2.15 x 10-4 M hydroxide ion at equilibrium. 4.65 × 10-11 2.15 × 10-4 3.67 10.33 1 points (Extra Credit)    QUESTION 4 What is the pH of a 0.020 M Ba(OH)2 solution? 1.40 1.70 12.30 12.60
1) If 0.33 mg of KCl is present in 1.0 L of aqueous solution, what is...
1) If 0.33 mg of KCl is present in 1.0 L of aqueous solution, what is the concentration in terms of the following? A) Molarity B) weight/volume percent C) parts per thousand D) parts per million 2) The serum concentration of cortisol, a hormone, is expected to be in the range 8–20 mg/dL. What is the part per million concentration of cortisol in serum that contains 10 mg of cortisol per deciliter? 3)How many milliequivalents of bicarbonate ion (HCO3- )...
1.What volume of a 1.50 M NaOH solution should be added to 50.0 mL of 1.20...
1.What volume of a 1.50 M NaOH solution should be added to 50.0 mL of 1.20 M acetic acid (CH3CO2H; Ka = 1.76×10-5) to obtain a buffer with pH = 5.450? a) 33.3 mL b) 6.70 mL c) 16.4 mL d) 67.0 mL e) 42.1 mL 2. Find the concentration of hydronium ion, H3O+, in a 0.200 M solution of sodium hypochlorite, NaOCl. Ka(HOCl) = 3.0×10-8. a) 7.8×10-5 M b) 1.3×10-10 M c) 1.0×10-7 M d) 3.9×10-11 M e) 2.6×10-4...