Pure acetic acid, which gives the sour taste to vinegar, has a melting point of 16.7 °C and a boiling point of 118 °C. Predict the physical state of acetic acid when the ambient temperature is 10 °C.
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Pure acetic acid, which gives the sour taste to vinegar, has a melting point of 16.7 °C and a boiling point of 118 °C. Predict the physical state of acetic acid when the ambient temperature is 10 °C.
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- Distillation is a physical process of separation of liquids that differ in what physical property? Freezing point Degree of size Solubility Melting Point Boiling pointhow many grams of table salt must be added to half a liter of water to raise its boiling point by 15 degrees celsius? how many grams of table salt must be added to half a liter of water to lower its freezing point by 10 degrees celsius?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 .
- The boiling point of water is 100.00 °C at 1 atmosphere. A student dissolves 14.27 grams of magnesium acetate, Mg(CH3COO)2 (142.4 g/mol), in 201.2 grams of water. Use the table of boiling and freezing point constants to answer the questions below. Solvent Water Formula H₂O Kb (°C/m) K (°C/m) 0.512 1.86 Ethanol CH3CH2OH 1.22 1.99 Chloroform CHCI 3 3.67 Benzene C6H6 2.53 5.12 Diethyl ether CH3CH2OCH2CH3 2.02 The molality of the solution is I m. The boiling point of the solution is °C.Solid turning into water at freezing point (0°C)A certain liquid X has a normal freezing point of 7.10°C and a freezing point depression constant =Kf3.27·°C·kgmol−1. A solution is prepared by dissolving some ammonium chloride (NH4Cl) in 700.g of X. This solution freezes at 6.4°C. Calculate the mass of NH4Cl that was dissolved. Round your answer to 1 significant digit. __g
- Balance each of the following chemical equations. Part C You may want to reference (Pages 226 - 233) Section 7.4 while completing this problem. Ca(OH)2 (aq) + HNO3(aq) → H2 0(1) + Ca(NO3)2(aq) Express your answer as a chemical equation. Identify all of the phases in your answer.A student dissolves 12.4g of ammonium nitrate (NH4NO3) in 200.g of water in a well-insulated open cup. She then observes the temperature of the water fall from 21.0°C to 16.9°C over the course of 7 minutes. NH4NO3(s) → NH+4(aq) + NO−3(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 2 significant digits. Note for advanced students: it's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the known and published values for this reaction. 1. Is this reaction exothermic, endothermic, or neither? 2.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. = kJ 3.Calculate the reaction enthalpy ΔHrxn per mole of NH4NO3. = kJ/molWhat is the freezing point of a ethanol solution if that same solution boils at 79.5 ℃? The normal boiling point and freezing point of pure ethanol (C2H5OH) are 78.29 ℃ and -114.2 ℃, respectively. For ethanol, Kb = 1.23 ℃/m and Kf = 1.99 ℃/m.Please enter your response in standard notation to one decimal place.
- ed The boiling point of water is 100.00 °C at 1 atmosphere. A student dissolves 12.63 grams of sodium sulfide, Na₂S (78.05 g/mol), in 163.3 grams of water. Use the table of boiling and freezing point constants to answer the questions below. Solvent Water Ethanol Chloroform Benzene Formula H₂O CH3CH₂OH CHCI 3 соно Diethyl ether CH3CH₂CH₂CH3 The molality of the solution is The boiling point of the solution is Kb (°C/m) Kf (°C/m) 0.512 1.86 1.22 1.99 3.67 2.53 2.02 m. °C. 5.12A certain liquid X has a normal boiling point of 129.30°C and a boiling point elevation constant =Kb2.32·°C·kgmol−1. A solution is prepared by dissolving some barium hydroxide (BaOH2) in 800.g of X. This solution boils at 130.2°C. Calculate the mass of BaOH2 that was dissolved. Round your answer to 1 significant digit. gThe boiling point of water is 100.00 °C at 1 atmosphere. A student dissolves 14.27 grams of magnesium acetate, Mg(CH3COO)2 (142.4 g/mol), in 201.2 grams of water. Use the table of boiling and freezing point constants to answer the questions below. Solvent Formula Kb (°C/m) Kf (°C/m) Water H₂O 0.512 1.86 Ethanol CH3CH2OH 1.22 1.99 Chloroform CHCl3 3.67 Benzene C6H6 2.53 5.12 Diethyl ether CH3CH2OCH2CH3 2.02 The molality of the solution is The boiling point of the solution is m. °C.