Question

You are given a 0.265 wt% stock solution of Disopyramide in a forensic solvent (mixture of...

You are given a 0.265 wt% stock solution of Disopyramide in a forensic solvent (mixture of water & methanol containing acetic acid & triethyamine). The density of the solution is 0.958 g/mL. What is the concentration of disopyramide in this stock solution in μg/μL? (μL refers to the whole solution, not only the solvent) State your answer using the correct number of significant figures.

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

find concentratino of disopyramide

assume a basis of 1 liter so

1 L = 1000 mL

mass of solution = 0.958 g/mL * 1000 mL = 958 g

mass of disopyramide = 0.265 /100 * 958 = 2.5387 g of disopyramide  

now,

micrograms =2.5387 g of disopyramide = 2.5387 *10^6 micro grams

V = 1 L = 10^6 microliters

concentration in microgram/microL = (2.5387 *10^6) / (10^6 ) = 2.5387 microgram/microliter

correct sig fig --> must be 3, so 2.5387 --> 2.54 microgram/microliter

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The density of a 40 wt% solution of ethanol in water is 0.937 g/mL. The density...
The density of a 40 wt% solution of ethanol in water is 0.937 g/mL. The density of n-butanol is 0.810 g/mL. What is the concentration of n-butanol in ppm if you dissolve 15 μL of this alcohol in a 40 wt% solution of Ethanol in water. The final volume of the solution is 25 mL. Assume that the density of the ethanol solution does not change upon dissolution of the butanol. Use the correct number of significant figures!
You mix 325 gallons of a mixture containing 12 wt% NaCl (sodium chloride) and 88 wt%...
You mix 325 gallons of a mixture containing 12 wt% NaCl (sodium chloride) and 88 wt% water (solution density = 1.0837 g/cm3) with a unknown volume of solution that is 20 wt% NaCl and 80 wt% water (solution density = 1.1453 g/cm3). You want to produce a mixture containing 19 wt% NaCl. Find the volume of the second feed solution.
1)You are given a protein solution with a concentration of 0.15 mg/ml. We need 10 µg...
1)You are given a protein solution with a concentration of 0.15 mg/ml. We need 10 µg for an experiment. What volume of the protein solution do we need? My answer: Convert 0.15 mg/ml to μg/ μl and you will get 150 μg/ μl. C = M/V rearrange for Volume V= M/C , V= (10 μg)/(150 μg/ μl) = 0.06667 μg/ μl 2) Suppose we want to prepare a solution containing 100 µg of the protein at a concentration of 1...
a) What volume of a 6.40  M stock solution do you need to prepare 500.  mL of a...
a) What volume of a 6.40  M stock solution do you need to prepare 500.  mL of a 0.0347  M solution of HNO3? b) The absorbance of a cationic iron(II) sample solution was measured in a spectrophotometer, but the instrument returned an error because the absorbance was too high. The sample was then diluted by using a pipette to take 100.0 μL of the sample and injecting it into a cuvette already containing 2.00 mL of water (total volume is 2.00 mL +...
1. When you added the aqueous base to the ether solution of the mixture (naphthalane and...
1. When you added the aqueous base to the ether solution of the mixture (naphthalane and benzoic acid), TWO important things happened that resulted in extraction of the benzoic acid into the aqueous phase, what were they? 2. Very often organic solutions are washed with brine, which is a concentrated solution of sodium chloride (salt) in water. If a solution of carbon tetrachloride as the organic solvent is washed with brine and the organic and aqueous solutions allowed to settle,...
A). To what volume should you dilute 121 mL of an 8.00 M CuCl2 solution so...
A). To what volume should you dilute 121 mL of an 8.00 M CuCl2 solution so that 52.0 mL of the diluted solution contains 4.44 g CuCl2? B). Silver nitrate solutions are often used to plate silver onto other metals. What is the maximum amount of silver (in grams) that can be plated out of 5.1 L of an AgNO3 solution containing 3.4 % Ag by mass? Assume that the density of the solution is 1.01 g/mL. Express your answer...
Part C A sucrose solution is prepared to a final concentration of 0.280 M . Convert...
Part C A sucrose solution is prepared to a final concentration of 0.280 M . Convert this value into terms of g/L, molality, and mass % (molecular weight, MWsucrose = 342.296 g/mol ; density, ρsol′n = 1.02 g/mL ; mass of water, mwat = 924.2 g ). Note that the mass of solute is included in the density of the solution. Express the concentrations in grams per liter, molality, and mass percent to three significant figures separated by commas. View...
1. Given the following reaction     2C2H6(l)   +      7 O2(g)   ®           4CO2(g)      +     
1. Given the following reaction     2C2H6(l)   +      7 O2(g)   ®           4CO2(g)      +        6H2O(l) How many moles of water are produced when 4.5 moles of oxygen react?        (Hint: Use slides 5-8) 2. Given: I2     +    3 F2      ®     2 IF3 How many moles of I2 are needed to form 3 moles of IF3? How many moles of F2 are needed to form 10 moles of IF3? How many moles of I2 are needed to react with 3.5 moles of F2?        ...
1.) You will work with 0.10 M acetic acid and 17 M acetic acid in this...
1.) You will work with 0.10 M acetic acid and 17 M acetic acid in this experiment. What is the relationship between concentration and ionization? Explain the reason for this relationship 2.) Explain hydrolysis, i.e, what types of molecules undergo hydrolysis (be specific) and show equations for reactions of acid, base, and salt hydrolysis not used as examples in the introduction to this experiment 3.) In Part C: Hydrolysis of Salts, you will calibrate the pH probe prior to testing...
Below is the background info for the lab assignment. The 4 blank boxes are the questions...
Below is the background info for the lab assignment. The 4 blank boxes are the questions I would like answers too. The end point for the fine titration was 35.90 mL in the burette when the solution turned bright green again. And the coarse titration I got 35.36mL as the end point. 35.9 mL is exact in case you need that info. Thanks! Background In this lab, we will determine the amount of alcohol (ethanol), C2H5OH, in a commercial vodka...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT