Ask a question
Analytical chemistry
admin
Preparation and standardization of a 1 M NaOH solution Calculate the following before beginning this task: a. The volume of a stock 6 M NaOH solution required to prepare 250 mL of a 1 M NaOH solution.
To answer Answers (1)
Analytical chemistry
admin
If concentrated nitric acid is listed as 70% w./w. What’s the other 30 percent of the concentrated HNO_3 solution?
To answer Answers (1)
Analytical chemistry
admin
What is volumetric analysis in analytical chemistry?
To answer Answers (1)
Analytical chemistry
admin
According to its nutrition label, orange soda contains 49 g of sugar per 355-mL serving. If the density of the beverage is 1.043 g/mL, what is the percent sugar concentration in orange soda? (Hint: This is a two-step problem. First use the density to conv
To answer Answers (0)
Analytical chemistry
admin
Which of the following best describes a 2 molar sucrose solution? a. one liter of solution that contains 2 moles of sucrose b. one liter of solution that contains 2 moles of water c. one liter of solution that contains 6.02 x 1023 molecules of sucrose d.
To answer Answers (1)
Analytical chemistry
admin
How many grams of glucose are in 165 mL of a 5.50% (m/v) glucose solution?
To answer Answers (1)
Analytical chemistry
admin
While making a 10% m/v NaCl solution, a student weights out of NaCl and measures 100 mL of water. The student then pours the NaCl into the water and stirs until it is dissolved. What mistake(s) did the student make while preparing this solution?
To answer Answers (1)
Analytical chemistry
admin
Commercially available concentrated hydrochloric acid is 37.0% w/w HCl. Its density is 1.18 g/mL. Using this information calculate (a) the molarity of concentrated HCl, and (b) the mass and volume (in
To answer Answers (1)
Analytical chemistry
admin
You have a solution containing 12 mg/ml of protein bovine serum albumin (BSA). Molecular weight of BSA is 68000. Calculate the concentration of this solution, expressed as mM.
To answer Answers (1)
Analytical chemistry
admin
The atmosphere contains about 5.2 x 1015 tons of air. What mass (in metric tons) of carbon dioxide is in the atmosphere if the concentration of CO2 is 394 ppm?
To answer Answers (1)
Analytical chemistry
admin
What volumes of 8N and 4NHCl must be mixed to prepare 450ml of 5N HCl solution?
To answer Answers (1)
Analytical chemistry
admin
How can you prepare 50% and 70% ethanol from 95% ethanol?
To answer Answers (1)
Analytical chemistry
admin
When using vacuum filtration which type of tubing is best? Thick-walled tubing or thin-walled tubing.
To answer Answers (1)
Analytical chemistry
admin
When SPE or other extraction techniques are used, an internal standard is added before the sample is analyzed by GC or HPLC. Why?
To answer Answers (1)
Analytical chemistry
admin
What is the mass percent of an aqueous sodium hydroxide solution in which the molarity of NaOH is 4.37 M? The density of the solution is 1.1655 g/mL.
To answer Answers (1)
Analytical chemistry
admin
Write the elution order of the following: (a) Propyl acetate, (b) Butyl acetate, (c) Methanol, (d) Ethanol, (f) 2-butanone, (g) 4-methyl-2-pentatnone.
To answer Answers (1)
Analytical chemistry
admin
An aqueous magnesium chloride solution is made by dissolving 7.26 moles of MgCl_2 in sufficient water so that the final volume of the solution is 4.30 L.
To answer Answers (0)
Analytical chemistry
admin
The density of a sodium sulfate solution is 1.07 g/cm^3. The solution is 8.00% sodium sulfate by mass. How many cm^3 of the solution are needed to supply 4.28 g of sodium sulfate?
To answer Answers (1)
Analytical chemistry
admin
What is the difference between concentrated HCl and 5% HCl (aq)?
To answer Answers (1)
Analytical chemistry
admin
How many grams of NaCl must be combined with water to prepare 460 mL of a 0.90 % (m/v) physiological saline solution?
To answer Answers (1)
Analytical chemistry
admin
What is the molarity of a 50% by mass solution of NaOH, given the density of the solution is 1.05 g/ml?
To answer Answers (1)
Analytical chemistry
admin
To prepare a solution of 50% sulfuric acid, a dilute waste acid containing 28% H 2 S O 4 is fortified with a purchased acid containing 96% H 2 S O 4 . How many kilograms of the purchased acid must be bought for each 100 kg of dilute acid?
To answer Answers (1)
Analytical chemistry
admin
How would you prepare 1 liter of 0.4 M NaOH from solid NaOH?
To answer Answers (1)
Analytical chemistry
admin
How would you prepare 500 mL of a 0.9% saline (NaCl) solution of water?
To answer Answers (1)
Analytical chemistry
admin
Determine the mass of sodium fluoride that could be isolated from a 170 g tube of 1500 ppm fluoride toothpaste.
To answer Answers (1)
Analytical chemistry
admin
A container contains a mixture of sand,salt,and pebbles. How can each substance be separated from the others?
To answer Answers (0)
Analytical chemistry
admin
Describe how you could make 10 mL of a 1.25% (m/v) NaOH solution.
To answer Answers (1)
Analytical chemistry
admin
How many moles of HBr are in 1.5 mL of concentrated hydrobromic acid (48% w/w)? The density of the acid solution is 1.49 g/mL.
To answer Answers (1)
Analytical chemistry
admin
What is quality control in analytical chemistry?
To answer Answers (1)
Analytical chemistry
admin
What is statistical analytical chemistry?
To answer Answers (1)
Analytical chemistry
admin
What is digestion in analytical chemistry?
To answer Answers (1)
Analytical chemistry
admin
Guinness^{TM} beer typically has an alcohol content of 4.7% (w:v). How many grams of alcohol are in a 0.50 L serving? (This serving size is about 17 fluid ounces.)
To answer Answers (1)
Analytical chemistry
admin
How would you prepare 500 mL of 6.0 M NaOH solution using solid NaOH pallets?
To answer Answers (1)
Analytical chemistry
admin
You want to generate 1500 mL of 80% isopropyl alcohol (liquid; MW = 60.8g/mol) to use for disinfecting your lab room. How much isopropyl alcohol should you measure to make this solution?
To answer Answers (1)
Analytical chemistry
admin
Guinness beer typically has an alcohol content of 4.7% (w:v). How many grams of alcohol are in a 0.50-L serving? (This serving size is about 17 fluid ounces.)
To answer Answers (1)
Analytical chemistry
admin
What is 18 percent as a fraction?
To answer Answers (1)
Analytical chemistry
admin
Calculate the normality of 4 g sodium hydroxide in 100 mL of solution.
To answer Answers (1)
Analytical chemistry
admin
In HPLC, which factors would be least effective in improving resolution of overlapping peaks? a. Change functionality of stationary phase b. Change solvent pH c. Increase column length d. Decrease mobile phase/flow rate
To answer Answers (1)
Analytical chemistry
admin
Commercial bleach contains 5.25% (by mass) of NaClO in water. It has a density of 1.08 g/mL. Calculate the molarity of this solution.
To answer Answers (0)
Analytical chemistry
admin
An experiment in your laboratory requires 500 mL of a .0200 M solution of N a 2 C O 3 . You are given solid N a 2 C O 3 ., distilled water, and a 500 mL volumetric flask. Describe how to prepare the required solution showing all calculations and describ
To answer Answers (1)
Главная › Science › Analytical chemistry
Authorization
*
*

Entry Lost your Password ?
Password generation
Get New Password