A certain liquid X has a normal boiling point of 144.80 °C and a boiling point elevation constant K,=2.39 °C·kg•mol 1 A solution is prepared by dissolving some glycine (C,H,NO,) in 650. g of X. This solution boils at 148.5 °C. Calculate the mass of C,H,NO, that was dissolved. Round your answer to 2 significant digits. ol. Ox10

5. The synthesis of aspirin (acetylsalicylic acid) is shown below. ملا OH OH salicylic acid ("SA”) ● + H3C CH3 acetic anhydride ("AA") H3C OH aspirin ("AS") a) If you start with 0.25 grams of salicylic acid and 2.0 mL of acetic anhydride (d=1.08 g/mL), how much aspirin can you theoretically synthesize? + CH3COOH Show two calculations for the theoretical yield of aspririn: 1 with 0.25 g SA and 1 with 2.0 mL of AA. Compare the theoretical amounts of aspirin from both calculations to determine the limiting reagent. Circle/label the limiting reagent and its theoretical yield of aspirin

A certain liquid X has a normal freezing point of -3.10 °C and a freezing point depression constant K₁=5.02 °C-kg-mol. A solution is prepared by dissolving some sodium chloride (NaCl) in 300. g of X. This solution freezes at -4.1 °C. Calculate the mass of NaCl that was dissolved. Round your answer to 2 significant digits. 1 g 1 x10

A solution containing 78 g of NaNO3 in 70. g H2O at 50 ° C is cooled to 20 °C. Use the solubility data from the table below. Part A Solubility (g/100. g H2O) Substance 20 °C 50 °C How many grams of NaNO3 remain in solution at 20 °C? KCI 34 43 Express your answer in grams to two significant figures. NaNO3 88 110 ? C12 H22O11 (sugar) 204 260

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Calculate the mass of potassium hydrogen phthalate (KHP) molar mass=204.22 P) (₁ your answer has the correct number of significant digits. g KHP 0 x10 X g mol required to neutralize 20.00 mL of a 0.250 M NaOH solution. Be sure

The solubility of KNO, is 155 g per 100.0 g of water at 75 °C and 38.0 g at 25 "C. What mass of KNO, will crystallize out of solution if exactly 225.0 g of its saturated solution at 75 °C is cooled to 25 °C? Round your answer to 3 significant digits. G

The solubility of NaCl in water is 35.7 g/100 mL at 25 degrees Celcius. If 100. g of NaCl is added to 200 mL of water at 25 degrees Celsiud, how much NaCl will remain undissolved?

5. Sodium bicarbonate (NaHCO3) is used to neutralize acids to form sodium chloride, a salt, carbon dioxide gas, and water. Normally sodium bicarbonate is added until the fizzing ceases, at which point no more CO2 (g) is produced. NaHCO3 (s) + HCl (aq) NaCl (aq) + CO2 (g) + H2O (1) If 150. mL of 3.0 M HCl is spilled on a lab bench, what is the minimum mass of sodium bicarbonate that must be used to neutralize the acid?

A student dissolves 13.7 g of potassium hydroxide KOH in 200. g of water in a well-insulated open cup. He then observes the temperature of the water rise from 22.0°C to 34.0°C over the course of 7.3 minutes. KOHs + K+aq -> OH−aq You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to the correct number of significant digits. Is this reaction exothermic, endothermic, or neither? If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case. Calculate the reaction enthalpy ΔHrxn per mole of KOH .