You want to make 50mL of an aqueous solution containing 0.25 M of NaH2PO4. The MW of Na2PO4 is 119.98. To make this solution, how much NaH2PO4 would you add?
You want to make 50mL of an aqueous solution containing 0.25 M of NaH2PO4. The MW...
If you have a 20mM solution of NaH2PO4 and you want to make a solution of pH=6.42, what should be the concentration of Na2HPO4 ? The pka of these two forms is 6.82. - Bonus Q: How many grams of Al(SO4)3 18H20 (MW 666.42 g/mol) would you add to 200 ml water to make a 20mm stock solution? sm wolnaza arlok
Goal- to make a 1L solution of phosphate buffer at pH 7.8 If you make up a 1M aqueous solution each of: NaH2PO4 and Na2HPO4 How much of each solution would you need to add (mix) to make up a 1 liter solution of 0.4 M phosphate at pH 7.8 Hint: the pKa for H2PO4- <-> HPO4 2- + H+ is 6.8)
7. You make 1 Liter of an aqueous solution containing 9.20 ml of 57.8 mM acetic acid and 56.2 mg of sodium acetate (MW = 82.0 g/mole). a. How many moles of acetic acid did you add? b. How many moles of sodium acetate did you add? c. What is the appropriate formula for calculating the pH of the above solution? d. What is the pH of the above solution? Is it acidic or basic? Slightly or strongly so? (Use...
Can someone please help me? An experiment calls for 50ml of a 0.50 m aqueous solution of sodium hydrogen carbonate (sodium bicarbonate, or baking soda) work with your team to describe the steps you would use in order to make up such a solution, such that, you have none left over?
a) You need to make an aqueous solution of 0.194 M sodium phosphate for an experiment in lab, using a 250 mL volumetric flask. How much solid sodium phosphate should you add? b)How many milliliters of an aqueous solution of 0.229 M ammonium iodide is needed to obtain 6.59 grams of the salt?
You need to make an aqueous solution of 0.227 M potassium carbonate for an experiment in lab, using a 250 mL volumetric flask. How much solid potassium carbonate should you add? __ grams How many milliliters of an aqueous solution of 0.122 M calcium acetate is needed to obtain 2.12 grams of the salt? __mL
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 need to make an aqueous solution of 0.162 M barium chloride for an experiment in lab, using a 500 mL volumetric flask. How much solid barium chlorideshould you add
You need to make an aqueous solution of 0.227 m sodium nitrate for an experiment in lab using a 300 ML volumetric flask. How much sodium nitrate should you add?
You need to make an aqueous solution of 0.181 M magnesium bromide for an experiment in lab, using a 300 mL volumetric flask. How much solid magnesium bromide should you add?