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- Fifty milliliters of dextrose 70 % (w/v) is mixed with 250 mL of purified water. What is the final concentration of dextrose, in milligrams per milliliter? Round to the nearest whole number.d. 1.10 g of K3PO4 in 430.0 mL of solution Mx+ =| M %3D Mpo, Mwich solution 0.50M NaCl or 0.25M SrCl2 has larger concen_tration when expressed in μg/mL
- What’s the ratio M/A for the 7.5 ml Dilution?Look at the diagram below of a ten-fold serial dilution. Serial Dilution 1 mL stock 9 mL stock solution & 9 ml saline 9 mL saline 9 mL saline 9 mL saline 9 mL saline solution solution solution solution solution 1 mL D2 solution to D3 1 mL D3 solution to D4 1 mL D4 solution to D5 1 mL D5 solution to waste D1 D2 D3 D4 D5 D6 In this diagram, D1 is the original solution. For a ten-fold serial dilution, first add 9 mL of solvent (eg. Saline) to 5 new tubes marked D2-D6. Take 1 mL of D1 solution, add to tube D2 and mix. Take 1 mL of D2, add to D3, and mix. Take 1 mL of D3, add to D4, and mix. Take 1 mL of D4, add to D5, and mix. Take 1 mL of D5, add to D6, and mix. Problem 2. If tube D1 has 100% concentration, then what is the % concentration of tube D2? tube D3? tube D4? tube D5?5.00 ml of the 1.0 x 10-4 M CV stock solution is first diluted to 100.ml. Then 1.00 ml pf this solution is diluted again to 50.0 ml. What is the final concentration?
- If 400 mL of a 18% v/v solution of methyl salicylate in alcohol is diluted to 1500 mL, the concentration of the resultant solution is _____ % v/v.8. Find the final concentration of ethanol as a percent (v/v) when 30 mL of ethanol 50 % (v/v), 60 mL of ethanol 70 % (v/v), and 40 mL of ethanol 95 % (v/v) are mixed together.Maganite is the leading brand for antacid to alleviate heartburn. Its active ingredient is a saturated solution of magnesium hydroxide (milk of magnesia) which neutralizes the sudden increase of H+ during heartburn. Its manufacturing company performed microtitration to simulate how the drug works upon intake. A 50.0 mL saturated solution was prepared. After filtering each solution, a 5.0 mL aliquot was transferred to a 25.0 mL Erlenmeyer flask and was titrated using pre-standardized 0.0320 M HCl which resembled the gastric acid. The endpoint was reached after the addition of 52.2 μL titrant. What is the concentration of hydroxide ions in the solution? Determine solubility s.
