How could you make 500 mL of a 0.1 M glycine HCl solution? the MW of glycine is 75.07 and assume you have 6.0 M HCl available.
NH_{2}CH_{2}COOH + HCl NH_{2}CH_{2}COOH.HCl
Moles of glycine.HCl in the solution = 0.1 M x 500 mL = 50 mmol = 50 x 10^{-3} mol ( 1 mmol = 10^{-3} mol)
Thus, moles of glycine required = 50 x 10^{-3} mol
Also, moles of HCl required = 50 x 10^{-3} mol
Molar mass of glycine = 75.07 g/mol
Hence, the mass of glycine required = 75.07 g/mol x 50 x 10^{-3} mol
= 3.75 g
Given, concentration of HCl = 6.0 M
Hence, the volume of HCl required = 50 x 10^{-3} mol/6.0 M
= 8.3 x 10^{-3} L
= 8.3 mL ( 1 L = 1000 mL)
Hence, the volume of water to be added to make the solution = (500 - 8.3) mL = 491.7 mL
Hence, to make the solution, 3.75 g of glycine is to be dissolved in 491.7 mL of water and then 8.3 mL of 6.0 M of HCl is to be added.
How could you make 500 mL of a 0.1 M glycine HCl solution? the MW of...
1- 50 ml of a 2 M Na acetate solution is mixed with 100 ml of a 0.1 M of acetic acid solution. Calculate the pH of the buffer. Show your calculation Pk, value of acetic acid = 4.75 (4 points) PH=4.75+ 50x2 - 100 = 10 100001 PH = 4.7 + 10 = 114.75 Describe how you make a 250 ml of a 10% glycine solution (MW=75.07). EXPLAIN the steps that you would take in Lab. 4 points 2-Determine...
how many mL of a 0.20 M solution of HCl are needed to make 500 mL of a pH 2.00
how much HCL is needed? please show calculations Prepare 500 mL of a 0.1 M HCl (conc. HCl stock is approx. 12.1 M) solution by diluting the appropriate quantity of conc. HCl with distilled water. Show your instructor the calculation before making the solution. Fill your burette with the HCl solution and standardize it against sodium carbonate as follows.
It is titrated with 0.1 M HCl 25 mL of a solution which contains a mixture of salts: NaHA and Na2A. Two points are known from the valuation curve: 1) when adding 1.25 mL of HCl the pH is 6.0 and 2) Add 12.5 mL of HCl the pH is 4.5. Calculate the volume of the 0.1 M HCl solution necessary for the complete evaluation of both salts H2A (pKa1 = 3.0, pKa2 = 6.0). ANSWER 35 mL
How many grams of NaCl (MW 58.44) should you use to make a 500 ml of a 0.64 M solution?
Which solutions below would be described as a buffer solution? A) 500 mL of 0.1 M HCl added to 500 mL of 0.1 M NaOH B) 500 mL of 0.1 M HCl added to 500 mL of 0.1 M NaCl C) 500 mL of 0.1 M HCNO added to 500 mL of 0.1 M KCNO D) 500 mL of 0.1 M HCNO added to 250 mL of 0.1 M KCNO E) 500 mL of 0.1 M HCNO added to 250...
QUESTION 5 How many grams of Tricine (MW = 179) would you need to make 300 mL of a 20 mM solution? QUESTION 6 How many grams of Tricine (MW = 179) would you need to make 50 mL of a 10 UM solution? QUESTION 7 How many grams of magnesium chloride (x6H2O) are contained in 250 mL of a 0.1 M solution? QUESTION 8 How many grams of sucrose (MW 342) are contained in 250 mL of a 0.1...
You want to dilute a 6.00 M HCl solution to 3.01 M. You need 500. mL of the diluted solution. How much stock solution (6.00 M HCl) must you use? Give your answer in mL.
The titration of 50.00 mL solution of a 0.1 M OAc- with 0.2 M HCl. OAc- is a weak base. Ka for acetic acid = 1.75 * 10^-5. a) Calculate the pH of the 50.0 mL of 0.1 M OAc- solution before the addition of any HCl. b) Calculate the pH of the resulting solution after the addition of 5.0 mL of 0.2 M HCl to the 50.0 mL of 0.1 M OAc- solution. c) Calculate the pH of the resulting...
QUESTION 2 Suppose you have 20 mL of 0.1 M HCl. What will the pH of the solution be after 10 mL of 0.1 M NaOH is added? Report your answer to 2 significant figures (i.e., 2 decimal places). Suppose you have 20 mL of 0.1 M HCl. What will the pH of the solution be after 30 mL of 0.1 M NaOH is added? Report your answer to 2 significant figures (i.e., 2 decimal places).