The boiling point of diethyl ether, , is 34.500 °C at 1 atmosphere.  In a laboratory experiment, students synthesized a new compound and found that when 12.59 grams of the compound were dissolved in 259.3 grams of diethyl ether, the solution began to boil at 35.045 °C. The compound was also found to be nonvolatile and a non-electrolyte. What is the molecular weight they determined for this compound?  g/mol

Relative solubilities of salts in liquid ammonia can differsignificantly from those in water. Thus, silver bromide issoluble in ammonia, but barium bromide is not (thereverse of the situation in water). Write a balanced equation for the reaction of anammonia solution of barium nitrate with an ammoniasolution of silver bromide. Silver nitrate is soluble inliquid ammonia. What volume of a 0.50 M solution of silver bromidewill react completely with 0.215 L of a 0.076 M solutionof barium nitrate in ammonia? What mass of barium bromide will precipitate fromthe reaction in part (b)?

The (aq) designation listed after a solute indicates the process of hydration. Using KBr(aq) and C2H5OH(aq) as your examples, explain the process of hydration for soluble ionic compounds and for soluble covalent compounds.

efine the term strong electrolyte. What types of substances tend to be strong electrolytes? What does a solution of a strong electrolyte contain? Give a way to determine if a substance is a strong electrolyte.

What happens if you add a very small amount of solid salt (NaCl) to each beaker described below? Include a statement comparing the amount of solid eventually found in the beaker with the amount you added: a a beaker containing saturated NaCl solution, b a beaker with unsaturated NaCl solution, c a beaker containing supersaturated NaCl solution. A saturated sodium chloride solution.

Use the term soluble, insoluble, or immiscible to describe the behavior of the following pairs of substances when they are shaken together: a.25mL of cooking oil and 25mL of vinegar the resulting mixture is cloudy and gradually separates into two layers. b.25mL of water and 10mL of rubbing alcohol the resulting mixture is clear and colorless. c.25mL of chloroform and 1g of roofing tar the resulting mixture is clear but dark brown in color.

Two liters of a 1.5 M solution of sodium hydroxide are needed for a laboratory experiment. A stock solution of 5.0 M NaOH is available. How is the desired solution prepared?

An experiment in a general chemistry laboratory calls for a 2.00-M solution of HCl. How many mL of 11.9 M HCl would be required to make 250 mL of 2.00 M HCl?

Use the term soluble, insoluble, or immiscible to describe the behavior of the following pairs of substances when they are shaken together: a.25mL of water and 1g of salt the resulting mixture is clear and colorless. b.25mL of water and 1g of solid silver chloride the resulting mixture is cloudy and solid settles out. c.25mL of water and 5mL of mineral oil the resulting mixture is cloudy and gradually separates into two layers.

Addition of water to concentrated sulfuric acid is dangerous because it generates enough heat to boil the water, causing it to spatter out of the container. For this reason, chemists remember to add acid to water. In a dilution experiment, we calculate the amount of the more concentrated solution that must be measured out. If we place this concentrated solution (Figure 4.7) in the volumetric flask first, then dilute with water, we violate the caution Add acid to water. Describe a safer variation on the method shown in Figure 4.7 that allows the quantitative dilution of concentrated sulfuric acid. Figure 4.7 Preparing a dilute solution from a concentrated solution. (a) Draw the concentrated solution into a pipet to a level just above the calibration mark. (b) Allow the liquid to settle down to the calibration line. Touch the tip of the pipet to the side of the container to remove any extra liquid. (c) Transfer this solution to a volumetric flask. Again touch the pipet to the wall of the flask to ensure complete transfer, but do not blow out the pipet because it is calibrated for a small amount of liquid to remain in the tip. (d) Dilute to the mark with solvent. Frequently, especially with concentrated acids, it is best to have some solvent present in the volumetric flask before you add the concentrated sample.