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- Interface/acellus.engine.html?ClassID=1224300001# Share files over Blu... FL-CA - Student Inf... Aar lations 3) Thomas Jefferso... What mass of CaCl2 must be dissolved in 1000. g H₂O in order for the boiling point to be 100.75 °C? mass CaCl2 MM CaCl₂ = 110.98 g/mol KbH₂O = 0.51 °C/m BPH₂O = 100.0 °C massCaCl₂ = [?] g Hint: Is CaCl2 ionic or covalent? 003-2022 International Academy of Science. All Rights Reserved. apush chapter 7 ma... DELL Enter Just Shaning and lear X * MindTap - Cengage Learning water treatment systems - Forkly X + takeAssignment/takeCovalentActivity.do?locator=assignment-take [Review Topica] [References) Use the References to access important values if needed for this question. The freezing point of ethanol, CH3CH2OH, is -117.300 °C at 1 atmosphere. K(ethanol) = -1.99 °C/m In a laboratory experiment, students synthesized a new compound and found that when 13.72 grams of the compound were dissolved in 204.2 grams of ethanol, the solution began to freeze at -118.030 °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 Submit Answer Retry Entire Group 9 more group attempts remaining ted 10:07 PM 11/17/2021ming and lear X water treatment systems - Forkly X+ "takeAssignment/takeCovalentActivity.do?locator=assignment-take [Review Topics] [References) Use the References to access important values if needed for this question. An aqueous solution is made by dissolving 15.8 grams of sodium chloride in 423 grams of water. The molality of sodium chloride in the solution is m. An error has been detected in your answer. Check for typos, miscalculations etc. before submitting your answer. Submit Answer Retry Entire Group 8 more group attempts remaining 国
- Calculate the quantity of lime and soda required for softening one million litre of the following sample of water. If the purities of lime and soda are 80% and 85% respectively. The impurities are Silica mg/lit. CaSO4 = 68 mg/lit. MgCO3 = 884 mg/lit. CaCO3 = 120 mg/lit. 75 mg/lit. MgCl2 = 19 mg/lit. MgSO4 = 30 %3D %3DConsider the solution process below. Select the true statement. AH1 AH, AH Expanded solvent Expanded solute Solute Solvent Step 1 Step 2 AH3 Direct formation of solution Step 3 AH3 is endothermic. O Enthalpy of solutions, AHsolution = AH1 + AH2 + AH3 %3D The greater the intermolecular force between solute molecules, the more exothermic AH, is. O AHsolution is always positive.Dissection х-ахis у-аxis Solubility (g Pb(NO3)2/100 g water) Plot below points and Draw a line between the points Temperature (°C) and beyond in both directions past the data points. Use this line to answer the following questions. 92.1 115 1. What would the solubility be at 35 °C of lead 70.1 91.2 nitrate? 49.6 78.6 2. What would the solubility be at 25 °C of lead 31.2 61.4 nitrate? 3. What temperature would be necessary to create a solution with solubility of 65 g/100 ml? 4. Explain at the molecular level why this relationship exists between temperature and على المستوى الجزيئي ما هو سبب وجود علاقة بين درجة الحرارة وقابلية الذوبان؟.solubility 5. Use the diagram to explain the terms to define (saturated, unsaturated and باستخدام مخطط عرف )محلول غیر مشبع , محلول مشبع , محلول فوق المشبع(.supersaturated
- Table 2. Data for Experiment Estimating Osmolarity by Change in Weight % Change in Weight Initial Solution Mass Final Mass DI Water 4.84 6.24 0.2 M 3.78 4.1 0.4 M 3.71 3.32 0.6 M 3.75 2.87 0.8 M 3.68 2.65 1.0 M 3.73 2.39 You need to calculate the % Change in Weight for the above tableand lear X water treatment systems - Forkly X + eAssignment/takeCovalentActivity.do?locator=Dassignment-take [Review Topica] [References] Use the References to access important values if needed for this question. The boiling point of chloroform CHCI3 is 61.70°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in chloroform is aspirin How many grams of aspirin, C,H§O4 (180.1 g/mol), must be dissolved in 246.0 grams of chloroform to raise the boiling point by 0.400 °C ? Refer to the table for the necessary boiling or freezing point constant. Solvent Formula K, CC/m) K(C/m) Water H,O 0.512 1.86 Ethanol CH;CH,OH CHCI3 1.22 1.99 Chloroform 3.67 Benzene CH Diethyl ether CH;CH,OCH,CH;3 2.53 5.12 2.02 g aspirin. Şubmit Answer Retry Entire Group 9 more group attempts remaining 9:18 PM 11/17/2021There are two cases: 1. A semipermeable membrane is placed between 5 g/L potassium sulphite and 600 mM iron chloride 2. A semipermeable membrane is placed between 700 ppm manganese iodide and 853 ug/L copper bromide Calculate: • Driving force for each cases • Direction of water flow for each case • In what case the driving force is higher? Note: temperature of the system is 20 °C.
- One gram of caffeine dissolves in 55 ml of water, 7 ml of dichloromethane (DCM), 530 ml of diethyl ether, and 100 ml of benzene. Covert the solubility of caffeine in these four solvents into units of mg/ml. Which is the optimal solvent to extract caffeine from an aqueous solution? Why? Please type the answer4. If the amount of solvent was doubled to 200 grams, the solubility would: * O increase O decrease Ostay the sameCalculate the quantity of lime and soda required for softening one million litre of the following sample of water. If the purities of lime and soda are 80% and 85% respectively. The impurities are Silica = 75 mg/lit. MgCl2 = 19 mg/lit. MgSO4 = 30 mg/lit. CaSO4 = 68 mg/lit. MgCO3 = 884 mg/lit. CaCO3 = 120 mg/lit. (proper steps)