9a. Solution of Tifa is colorless while that of TiBra is orange. Explain the origin of...
A substance is orange in methyl orange, purple in crystal violet, yellow in bromthymol blue, colorless in phenolphthalein, green in bromcresol green, and yellow in allizarin yellow-R What is the narrowest pH range it can have Explain:
4. Explain why the solution being titrated first turns pink then goes colorless before the endpoint is reached. 5. A student gets a dark pink color for trial 2 but uses that data to calculate the mass percent of acetic acid. Would the mass percent be too high or too low? Explain and be specific Experiment 10 Determination of the Molar Gas Constant, R
Addition of phenolphthalein to an unknown colorless solution does not cause a color change. The addition of bromthymol blue to the same solution leads to a yellow color. Is the solution acidic, neutral, or basic? Which of the following can you establish about the solution: What other indicator or indicators would you want to use to determine the pH of the solution more precisely?
Please explain in words and in equation.
(5 pts) Chromium (VI) forms two different oxyanions, the orange dichromate ion, Cr207, and the yellow chromate ion, CrO42- The equilibrium reaction between the two ions is Cr2O72- +H20 (1) orange 2 CrO42- + 2 H+ (aq) yellow At equilibrium the solution starts out looking amber a color between orange and yellow. Explain what would happen to the solution of sodium hydroxide is added. 2-
3. What tests would you use to identify a solution of FeCl3? 4. A flame test of a colorless solution gives a bright yellow color. When reacted with AgNO, a white precipitate forms that dissolves when HNO, is added. When HCl is added to the unknown solution, bubbles form. What is the compound in the colorless solution?
250 Experiments 2. A solution causes a yellow color with thymol blue, an orange color with methyl orange, a color with methyl red, and a yellow color with bromthymol blue. The pH must le between and The estimated pH is_ b. A solution causes a yellow color with thymol blue, yellow colors with both methylona and methyl red, and a green color with bromthymol blue. The pH must lie between and The estimated pH is
Iron thiocyanate (FeSCN2+) is a complex ion that appears orange-red in solution. Iron(III) (Fe3+) and thiocyanate (SCN-) are both colorless in solution. FeSCN2+ (aq) --(equilibrium)-- Fe3+ (aq) + SCN- (aq) a) If you add Fe(NO3)3 to a solution of these ions at equilibrium, in which direction will the reaction run to reach a new equilibrium? b) Silver ions react with thiocyanate ions to form a white precipitate. If you add silver ions to a solution of these ions at equilibrium,...
explain the following observation , when glucose reacts with
bromine water , the color of the solution turned from brown to
colorless
o Explain the following observation when glucose neacts with bromine water the color of the solution turned from brown to colorless
HC2H3O2(aq) +
H2O()
C2H3O2-(aq) +
H3O+(aq)
In the example equilibrium system, a drop of methyl orange indicator was added. For this indicator, the solution will be red in high concentrations of HO+, and the solution will turn yellow in low concentrations of H,O+ Initially the equilibrium solution was orange. What color is expected after the addition of the NaC,H,O2? Explain your reasoning. a. b. Initially, the equilibrium solution was orange. What color is expected after the addition of a strong...
2. When does the color of the solution change from colorless to blue? During the elapsed time during which thiosulfate is being consumed is the consumption (reaction) of hydrogen peroxide greater than, less than, or equal to the thiosulfate being consumed? 3.