Calculate the molarity and osmolality of a 1 L solution containing the following solutes. Assume complete dissociation of all electrolytes.                                    Molarity (mmole/L)          Osmolality (mOsm/kg/H2O) 9 g NaCl             _______________             ____________ 100 g Glucose    _______________             ____________ 5 g Urea             _______________             ____________

could someone help me determine the osmolarity for these solutions? I’m supposed to do it without a calculator and using the clinical significant values for NaCl and glucose.

For the questions below be sure to show your work as well as the answer to the question. In this week's lab you made 100ml of 10x PBS by dissolving 8 g NaCl, 1.2g Na₂HPO4 and 0.2 g KH₂PO4 in water. You then adjusted the pH to 7.0. A) How many mg of KH₂PO4 did you weigh out? B) How many liters of 10x PBS did you make? C) What is the final concentration of NaCl in your solution? (The molecular weight of NaCl is 58.44 g/mol) D) What is the final concentration of Na₂HPO4 in your solution? (The molecular weight of Na₂HPO4 is 141.96 g/mol) E) What is the final concentration of KH₂PO4 in your solution? (The molecular weight of KH₂PO4 is 136.1 g/mol) F) What is the hydrogen ion concentration of your solution (pH=7.0)? G) If the initial pH of your solution was 6.29 would you need to add an acid or a base to adjust the pH of a solution to pH 7.0? 10x PBS is a concentrated stock solution that is used to make more dilute solutions of PBS. Starting with your 10xPBS stock solution, how would you…

If the osmolarity of a solution of NaCl is  2.4 OsM, what would it be as a percent solution? MW of NaCl = 58.44 g/mole