Astudent prepares a standardized solution of sodium hydroxide by the procedure outlined. the student first prepares a saturated solution of sodium hydroxide using freshly distilled or deionized water. she measures about 5 ml of the saturated solution with a graduated cylinder and diluted to 1 l in a plastic bottle with freshly distilled or deionized water to make a solution that is about 0.1 m. to determine the exact concentration, she puts the naoh solution in a buret and titrates a carefully-weighed pre-dried solid acid of known molar mass. she records the volume of naoh needed to neutralize it and repeats the process several times to determine the concentration of the naoh solution. she calculates the concentration and uncertainty in the concentration of the naoh from the titration data. why did the student not just weigh the sodium hydroxide directly to make the standardized solution?

The density of an unknown gas at 98°c and 740 mmhg is 2.50 g/l. what is the molar mass of the gas with work showed?

7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation. 8. when a 2.5 mol of sugar (c12h22o11) are added to a certain amount of water the boiling point is raised by 1 celsius degree. if 2.5 mol of aluminum nitrate is added to the same amount of water, by how much will the boiling point be changed? show all calculations leading to your answer or use 3 – 4 sentences to explain your answer. 9. if 5.40 kcal of heat is added to 1.00 kg of water at 100⁰c, how much steam at 100⁰c is produced? show all calculations leading to an answer. 10. the freezing of water at 0⁰c can be represented as follows: h2o (l) ↔ h2o(s) the density of liquid water is 1.00 g/cm3. the density of ice is 0.92 g/cm3. in 3 – 4 sentences explain why applying pressure causes ice to melt.

What is the empirical formula for c4h8o2