An isotonic solution of pilocarpine hydrochloride is being preapred at a 1.5 % w/v concentration. This drug has an e-Value of 0.24. The pharmacist needs to prepare 30 mL of the pilocarpine hydrochloride solution but also make it isotonic. The pharmacist will add enough boric acid to make the solution isotonic when a sufficient quantity of sterile water is added. Boric acid has a 61.83 g/mol molar mass and an e-Value of 0.52.What mass of boric acid, in units of milligrams, is needed to make this 1.5 % pilocarpine hydrochloride solution isotonic?Round the answer to one decimal place.

Assume that a sample of hard water contains 50. mg/L of Mg2+ and 150 mg/L of Ca2+, with HCO3 as the accompanying anion. What mass of CaO should be added to 1.0 L of this aqueous solution to precipitate all the Mg2+ and Ca2+ as CaCO3 and MgCO3? What is the total mass of the two solids formed?

A compound has a solubility in water of 250 mg/L at 25C. Should this compound be characterized as a soluble or insoluble compound at 25C?

Distinguish between the terms slightly soluble and weak. electrolyte.

6-16 Answer true or false. (a) Solubility is a physical property like melting point and boiling point. (b) All solutions are transparent—that is, you can see through them. (c) Most solutions can be separated into their components by physical methods such as distillation and chromatography.

Compare Which of the following solutions has thehighest concentration? Rank the solutions from thegreatest to the smallest boiling point depression. Explainyour answer. a. 0.10 mol NaBr in 100.0 mL solution b. 2.1 mol KOH in 1.00 L solution c. 1.2 mol KMnO4 in 3.00 L solution

6-22 Answer true or false. (a) Water is a good solvent for ionic compounds because water is a polar liquid. (b) Small covalent compounds dissolve in water if they can form hydrogen bonds with water molecules. (c) The solubility of ionic compounds in water generally increases as temperature increases. (d) The solubility of gases in liquids generally increases as temperature increases. (e) Pressure has little effect on the solubility of liquids in liquids. (f) Pressure has a major effect on the solubility of gases in liquids. (g) In general, the greater the pressure of a gas over water, the greater the solubility of the gas in water. (h) Oxygen, O2, is insoluble in water.

The following table lists the concentrations of the principal ions in seawater: (a) Calculate the freezing point of seawater. (b) Calculate the osmotic pressure of seawater at 25 C. What is the minimum pressure needed to purify seawater by reverse osmosis?

1 4 7 8 When 2.19 g of a certain molecular compound X are dissolved in 100. g of formamide (NH, COH), the freezing point of the solution is measured to be - 0.4 °C. Calculate the molar mass of X. If you need any additional information on formamide, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to 2 significant digits. Submit Assign Continue O 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Acces

The molar mass of phenolphthalein, an acid-base indicator, was determined by osmotic pressure measurements. A student obtained an osmotif pressure of 14.6mm Hg at 25C for a 2.00-L solution containing 500.0 mg of phenolphthalein. What is the molar mass of phenolphthalein?