A 25.0 mL aliquot was taken from a 500.0 mL sample of tonic water containing an unknown amount of quinine and diluted to a volume of 200 mL. At 347.5 nm, the fluorescence intensity of the diluted sample was measured 75.5 an arbitrary scale. Under similar conditions, a 23.3 ppm standard quinine solution had a fluorescence intensity of 206. Calculate the mass of quinine in the original tonic water sample in mg. Do not include units in your answer. Answer:

A 25.0 mL aliquot was taken from a 500.0 mL sample of tonic water containing an unknown amount of quinine and diluted to a volume of 200 mL. At 347.5 nm, the fluorescence intensity of the diluted sample was measured 75.5 an arbitrary scale. Under similar conditions, a 23.3 ppm standard quinine solution had a fluorescence intensity of 206. Calculate the mass of quinine in the original tonic water sample in mg. Do not include units in your answer. Answer:

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...

See similar textbooks

Related questions

Q: 5. If equal volumes of the silver nitrate and aluminum chloride solutions were mixed, what value…

A: The aim of this question is to show the expected conductivity of a mixture formed by combining equal…

Q: Convert 22 miles to kilometers if 1 inch = 2.54 cm

A: Since we know that 1 inch = 2.54 cm 1 mile = 63360 inches. 1 m = 100 cm 1 km = 1000 m By using the…

Q: 12. Calculate the number of millimoles contained in 500 mg of each of the following substances: (a)…

A: Generally for moles we can use the following formula Moles=In the case of milli moles we use mass of…

Q: When sodium sulfide reacts with cobalt (II) acetate in water, cobalt (II) sulfide and sodium acetate…

A: This question can be solved as:

Q: eutralizati

A: Ans. Neutralization reaction may be defined as the reaction in which a strong acid react with strong…

Q: In the balanced equation for neutralization of nitric acid by barium hydroxide, the coefficient of…

A: Barium hydroxide is a strong base while nitric acid is a strong acid. Formula Barium hydroxide :…

Q: (1) In the table below, list the apparatus and chemicals required for this experiment. Apparatus…

A: Step 1: balance the different types of atoms in the given chemical equation in the both sides of the…

Q: Me Br OMe Br à Br MeO Br Br Br

A: The objective of the question is to name the given compounds

Q: Masses : Ca = 40.08 g S= 32.07 g O= 16.00 g A 35.0 mL sample of CaSO4 was evaporated to…

Q: The corn-rich diet of the rural South contained very little trytophan, an essential amino acid that…

A: Line water is a mixture of slaked lime and quicklime. The chemical formula of slaked lime is…

Q: Which of the following will produce a neutral solution when dissolved. Hint - will the dissolved…

A: The salts given are KF, NaCN and NH4I.

Q: Miss White has synthesized acetaminophen using a similar protocol to the one employed for this…

A: The objective of this question is to determine the amount of water that White should use in her…

Q: For the following reaction, 29.0 grams of calcium hydroxide are allowed to react with 23.7 grams of…

Q: 17.1 g of calcium chloride is dissolved in enough water to mate a 705. mL solution. What is the…

A: Given, mass of calcium chloride = 17.1 g We know, molar mass of calcium chloride(CaCl2) = 110.98…

Q: ues if needed for this question. A student wants to prepare a solution of chromium(II) iodide with a…

Q: After balancing the following reaction, give the correct coefficient for each specie. Use numbers…

A: A redox reaction is balanced by balancing the mass and charge. Hence the number of atoms of all the…

Q: Please don't provide handwritten solution...

A: Answer: B 9 mg/LExplanation:To find the critical dissolved oxygen (DO) concentration in the river,…

Q: Looking up one snowy afternoon from a book titled The Moral Case Against Turning Lead Into Gold (Or…

A: We need to write complete chemical equation for the reaction provided.

Q: Use the References to access important values if needed for this question. A student weighs out a…

A: Given -> Weight of KI = 3.47 gm Volume= 100 ml = 0.100 L (1L = 1000ml)

Q: What can you reasonably predict to occur when elemental bromine is added to a solution containing…

A: Elemental bromine oxidized iodide ions to iodine. A red iodine solution is formed if small amount…

Q: 4 Discuss the process of sampling and preparation of laboratory sample in quantitative analysis.

A: Sampling is a process in analytical chemistry.

Q: Calculate the molarity of a solution prepared from dissolving 1.601 moles of Na2S in 654 mL of…

A: Given,moles of Na2S = 1.601 molvolume of the water = 654 mL

Q: The mass of K3PO4 needed to prepare 250.0mL of an aqueous solution in which PO4-3 concentration is…

Q: A chemistry student needs to standardize a fresh solution of sodium hydroxide. She carefully weighs…

A: Given: The mass of the oxalic acid taken = 294 mg The volume of the NaOH solution taken = 140.7 mL…

Q: Nitroglycerin is a dangerous powerful explosive that violently decomposes when it is shaken or…

A: 1. The chemical reaction is the decomposition of liquid nitroglycerin to gaseous dinitrogen, gaseous…

Concept explainers

Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.

Question

Please don't provide handwritten solution ....

A 25.0 mL aliquot was taken from a 500.0 mL sample of tonic
water containing an unknown amount of quinine and diluted to a
volume of 200 mL. At 347.5 nm, the fluorescence intensity of the
diluted sample was measured 75.5 an arbitrary scale. Under
similar conditions, a 23.3 ppm standard quinine solution had a
fluorescence intensity of 206. Calculate the mass of quinine in the
original tonic water sample in mg. Do not include units in your
answer.
Answer:

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1: Variables given

VIEW

Step 2: Determine the mass of quinine in original solution

VIEW

Solution

VIEW

Step by step

Solved in 3 steps with 6 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

What another word for it
[Review Topics) [References) Use the References to access important values if needed for this question. Write a balanced equation for the reaction described, using the smallest possible integer coefficients. Omit states of matter. A precipitate forms when aqueous solutions of silver(I) nitrate and barium bromide are combined. It is not necessary for you to indicate which of the products is the precipitate. Submit Answer Retry Entire Group 3 more group attempts remaining теq Previous Next> Email Instructor Save and Exit Cengage Learning | Cengage Technical Support MacBook Pro Q Search Bing 2# & 5 7 8. %3D de E R T Y U P [ D F G H. K C MI .... 1V IN B
Foreattt part of iTIS qtestfoni; tonsider FOHOWIHg Btetat: You need to make a stock solution of Ca( C2H3O2 )2 with a concentration of 6.50 M. You have a 850.0 mL volumetric flask available to make this stock solution in. You are then tasked with using this stock solution to prepare a sample for use in an experiment. The experimental sample should have a final volume of 15.0 mL and a concentration of 0.350 M Ca(C2H3O2)2. a) What is the molar mass of Ca(C2H3O2)2? b) How many moles of the solute would be needed to create the stock solution using the volumetric flask available? c) How many grams of the solute should be added to the volumetric flask to create the stock solution? d) What volume, in mL, of the stock solution should be used to prepare the experimental solution through dilution? US 目 M
Twenty tablets (labelled 300 mg aspirin per tablet) had a total mass of 6.9117 g. The tablets were powdered and 0.5423 g of powder was added to 30.0 mL 0.494 M sodium hydroxide solution and the mixture boiled gently for 10 minutes. The excess alkali in the cooled solution was titrated with 0.475 M hydrochloric acid solution and 20.25 mL required for neutralization. Given that aspirin (C9H8O4) and NaOH react in a 1:2 ratio calculate the percentage of aspirin as compared to the labelled claim. Aspirin Mr(C9H8O4) = 180.2
Masses : Ca = 40.08 g S= 32.07 g O= 16.00 g A 35.0 mL sample of CaSO4 was evaporated to dryness, leaving 0.967 g of residue. What was the molarity of the original solution? step by step please
Please don't proviede handwritten solution ...