A 100 mL sample was diluted to 1L. 1 mL was tested and gave a result of 0.5 mg/mL vitamin C. What was the original concentration before dilution?
Group of answer choices
a)0.5 mg/ml
b)1 mg/ml
c)5 mg/ml
d)10 mg/ml
A 100 mL sample was diluted to 1L. 1 mL was tested and gave a result...
1) if 5 parts sample is added to 10 parts diluents, what is the dilution that was just made? 2. What is the ratio if 5 parts sample volume is added to 10 parts diluents volume? 3. In a 1 to 3 dilution, what is the dilution FACTOR? 4. In a 1 to 10 dilution, what is the dilution FACTOR? 5. What is the dilution FACTOR if 40 mcL of sample added to 260 mcL of diluent? 6. What is...
Five milliliters of 5% alcohol are added to 5 mL of urine. Two milliliters of this solution is diluted to 50 mL with water, and 5 mL of this are used for analysis. How many milliliters of urine are in the analysis sample? You are doing a procedure that calls for 5 mL of undiluted urine. You use 3 mL of a 1/5 dilution of urine instead. The answer obtained is 50 mg/dL. What result should be reported? A procedure...
Question 4 (1 point) If a 20 mL sample is diluted to 100 mL, the concentration of the diluted acid sample will be ____ that of the original stock acid O 1/4 01/10 1/5 O 1/2 the same as
Absorption calibration curve is y= 0.095 x + 0.0035. A diluted sample (1 mL in 50 mL) gives absorbance reading 0.188, after blank was already taken into account. What is the original concentration before the dilution?
a protein sample was diluted 1/5 and then 5ml of the diluted sample was mixed with 20 ml of reactants to give 25 ml total volume. from this 25 ml solution, 5ml were removed. this 5ml contain 3 mg of protein. what was the concentration of protein in the original sample
Absorption calibration curve is y= 0.095 x + 0.0035. A diluted sample (1 mL in 50 mL) gives absorbance reading 0.188, after blank was already taken into account. What is the original concentration before the dilution? Select one: O A. 1.94 OB. 97.11 O C. None of these OD. 92.25 0 O E. 0.185
A 100 mL sample of an acetic acid/sodium acetate bffer is diluted with 100 mL of distilled water. What is the effect of the dilution on the pH of the buffer? What is the e ect of the dilution on the buffer capacity?
If a solution of 10 mg/ml methyl orange is diluted 100 times, 1 ml added to 99 ml of water for example, what is the final concentration? A. 1 mg/ml B. 0.1 mg/ml C. 0.001 mg/ml
Exp 8 Pre-Lab Questions Name: Section: 140 6. A chemist takes a 100 mg/L vitamin C sample and exposes it to the open air for two weeks. The concentration of vitamin C in the exposed sample was reduced to 75 mg/L. Calculate the % decrease in vitamin C concentration in the original sample. Show your calculation 75/100 = 1 meaning that there was a 25% decrease In organd sample concetton When doing dilutions whilst working in concentration of mg/L, remember...
A 13.0 mL aliquot of a flouride sample solution was diluted to 250 mL in a volumetric flask. The F- concentration of this DILUTED sample was determined with a F- ion selective electrode and found to be 3.1 mg/L. What is the concentration of F- in the original, undiluted sample?