Suppose you start with a solution of red dye #40 that is 4.6 ✕ 10−5M. If...

Suppose you start with a solution of red dye #40 that is 4.6 ✕ 10⁻⁵M. If you do four successive volumetric dilutions pipetting 5.00 mL of solution and diluting with water in a 40.00 mL volumetric flask, what is the molarity of the final dilution?

Expert Solution

queen_honey_blossom answered 2 years ago

Suppose you start with a solution of red dye #40 that is 4.0 ✕ 10−5 M....

Suppose you start with a solution of red dye #40 that is 4.0 ✕ 10−5 M. If you do three successive volumetric dilutions pipetting 5.00 mL of solution and diluting with water in a 40.00 mL volumetric flask, what is the molarity of the final dilution?

Suppose you have a deck of 40 cards, containing 10 red cards and 30 black cards....

Suppose you have a deck of 40 cards, containing 10 red cards and 30 black cards. A player draws 7 cards from the deck and places them into their hand. The remaining deck of 33 cards has 5 red cards and 5 black cards in the top 10 cards. The other 23 cards in the remaining deck are unknown color. What is the probability of the player's hand having 0,1,2,3,4,5 red cards?

You wish to construct an absorbance versus concentration (A vs. C) plot for a FD&C food dye. Suppose you have a stock solution that is 2.13 x 10-5 M in this dye.

You wish to construct an absorbance versus concentration (A vs. C) plot for a FD&C food dye. Suppose you have a stock solution that is 2.13 x 10-5 M in this dye. Complete the following table (fill in the blanks) showing how the different calculations were performed Stock Concentration Volume of Stock (mL) Volume of Diluent (mL) Diluted Sample Concentration (M) 2.13 x 10-5 M 5.00 0.00 3.67 1.56 x 10-5 2.50 2.50 1.07 x 10-5 1.33...

Erioglucine is a bluecolored dye that absorbs its complementary color, red, in aqueous solution around 645...

Erioglucine is a bluecolored dye that absorbs its complementary color, red, in aqueous solution around 645 nm. Unfortunately, the local distilled water supply is consistently contaminated with a trace amount of a metal cation that also absorbs 645 nm light. Suppose then, a control sample of 0.0552 M erioglucine (aq; same water supply) has an absorbance of 0.331 and that a distilled water sample in a similar cuvette has an absorbance of 0.019. Determine the concentration of an erioglucine (aq)...

You make two dilutions. You take 82.19 mL of the stock solution (8.1×10-5M) and dilute to...

You make two dilutions. You take 82.19 mL of the stock solution (8.1×10-5M) and dilute to 500.0 mL to make Solution #1. You then add 66.26 mL of Solution #1 to 30.11 mL of water to make Solution #2. What is the concentration of the Solution #1 in terms of molarity? What is the concentration of the Solution #2 in terms of molarity?

6. For an 8x10-5M methyl red solution at pH 5, A525nm is 0.92. (1cm cells were...

6. For an 8x10-5M methyl red solution at pH 5, A525nm is 0.92. (1cm cells were used to make this measurement.) The experimenters ascertained the following two facts about this chemical system: (1) At 525nm, absorbance by MER- is negligible, and (2) Molar absorptivity at 525nm for HMER is 23,000. What is the dissociation constant for the dye methyl red? (pKa is between 4 and 6).

3a. If the molar absorptivity constant for the red dye solution is 5.56×104 M-1 cm-1 ,...

3a. If the molar absorptivity constant for the red dye solution is 5.56×104 M-1 cm-1 , calculate the molarity of the red dye solution with absorption = 0.900. You may assume L = 1.22cm. Hint: A=εLC b. Convert the molarity in part a to w/v%. Show your work. Molar mass of FD&C red #3 = 879.86g/mol w/v% is defined as weight (in grams) of solute/100 mL of solution You should remember that w/v% always refers to the grams of materials...

You mix 5.00 mL of 1.0 x 10-5M AgNO3 with 10.00mL of 2.00M NH3 solution resulting...

You mix 5.00 mL of 1.0 x 10-5M AgNO3 with 10.00mL of 2.00M NH3 solution resulting in the formation of the diamminesilver(I) complex ion, [Ag(NH3)2]+. (Assume volumes are additive.) a) Write the net-ionic equilibrium equation for the formation of this complex ion. b) Calculate the concentration of the complex ion in the reaction mixture.

Determine the pH of a 0.500 M HNO2 solution. Ka of HNO2 is 4.6 * 10-4....

Determine the pH of a 0.500 M HNO2 solution. Ka of HNO2 is 4.6 * 10-4. 1.82 1.67 2.67 0.30

You are given a 5M solution and you need to make the following dilutions: 1 M,...

You are given a 5M solution and you need to make the following dilutions: 1 M, 100 mM, and 25 mM. 4A. What is the dilution factor for each of these dilutions? 4B. If you need 5 mL of each of the diluted solutions, how much of the 5M stock would you use, and how much water would you add? Show your work.

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