DIAPER DISSECTION LAB REACTIONS OBSERVATIONS Powder collected from the diaper and mixed with After a while of adding 100 mL of water to the water powder in the beaker I noticed that after 5 minutes the solution started getting thicker, forming a gel-like substance. The mixture with Sugar The mixture with Salt (NaCl) The mixture with Calcium Chloride I noticed that when adding the crystals and the water solution with sugar there was no heat produced nor was the beaker cold. The solution did become translucent. But the gel state was still maintained I noticed that when adding the crystals and water solution with salt (NaCl) threw was no heat produced, nor was the beaker cold to the touch. It was again slightly translucent. And it remained in a liquid state I noticed that when adding the crystals and water solution with Calcium Chloride (CaC12). It started getting cloudy, clips were spony upon tapping with the

DIAPER DISSECTION LAB REACTIONS OBSERVATIONS Powder collected from the diaper and mixed with After a while of adding 100 mL of water to the water powder in the beaker I noticed that after 5 minutes the solution started getting thicker, forming a gel-like substance. The mixture with Sugar The mixture with Salt (NaCl) The mixture with Calcium Chloride I noticed that when adding the crystals and the water solution with sugar there was no heat produced nor was the beaker cold. The solution did become translucent. But the gel state was still maintained I noticed that when adding the crystals and water solution with salt (NaCl) threw was no heat produced, nor was the beaker cold to the touch. It was again slightly translucent. And it remained in a liquid state I noticed that when adding the crystals and water solution with Calcium Chloride (CaC12). It started getting cloudy, clips were spony upon tapping with the

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter11: Properties Of Solutions

Section: Chapter Questions

Problem 109AE: Patients undergoing an upper gastrointestinal tract laboratory test are typically given an X-ray...

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Assuming that pentane and hexane form an ideal solution, A. Calculate the amount of pentane to be added to 65.0 g of hexane to obtain a minimum dG of mixing from mixing those two components. [MM pentane; 72.15, MM hexane; -86.18] B. Calculate the dS of mixing the components of the mixture above.
In a lab test, a student in CHEM 2102 was provided with a solution of compound B (0.16 mol of B was dissolved in 100.0 mL of solvent A, the density of solvent A was 1.20 g/mL). He observed that the boiling point of the solution is 201.0 C. The students search for the molal boiling point elevation constant of the compound B and he found it to be 0.15 C. Kg/mol. Interestingly, while he was searching he found the heat of vaporization of the solvent A is 5.5 KJ/mol. Can the student use the given information to find SSurr for boiling process of solvent A. If yes, calculate the numerical value. Explain your answer.
Please answer this question as fast as you can please and tahnk you. I will afterwards write an wonderful review on solving the question. Thank you. Why is it important for us to leave the water for 5 minutes and determine the water's temperature? The density of water will vary with temperature. You want the water to equilibrate to room temperature in order to maintain consistent results. You want to wait so that the dissolved solids in the water settle to the bottom of the flask. It is impossible to determine the density of water below 20 °C with plastic beakers and cylinders so you need to wait for the water to warm up. It's not that important, we just want to stretch out the time of the experiment.
200 mg of granular salt is briefly stirred into a glass container of 1/2 liter volume filled with water. After briefly mixing, some salt is still seen at the bottom of the class. The visible salt at the bottom of the glass is filtered from the water, weighed and determined to have a mass of 50 mg. What is the dissolved phase concentration of salt remaining in the water? Provide your answer to the nearest whole number in units of mg/l.
The partial molar volumes of acetone and chloroform, in a solution in which the molar fraction of chloroform is 0.4693, are 74.166 cm3mol-1 and 80.235 cm3 mol-1, respectively. What is the volume of 1,000 kg of this solution? Data: M.M. (acetone) = 58.08 gmol-1; M.M. (chloroform) = 119.07 gmol-1.
Sodium chloride (NaCl) was isolated from SiO2 and CaCO3 by dissolving it in distilled water. Unmentioned is that CaCO3 is slightly soluble in water (0.001 g/100 mL). Describe the effect this fact will have on each component of the mixture: will the “isolated“ mass of each be greater than, equal to, or less than that in the sample?
A student determines the molar mass of a liquid unknown by the method used in this experiment. She found that the equilibrum temperature of a mixture of ice and water was 1.0 degrees C on her thermometer. When she added 11.1 g of her unknown sample to the mixture, the temperature, after thorough stirring, fell to -3.0 degrees C. She then poured off the solution through a screen into a beaker. The mass of the solution was 90.4 g. Kf=1.86 degrees C/m How much water was in the decanted solution? What did she find to be the molar mass of the unknown liquid, assuming she made the calculation properly?
A student determines the molar mass of a liquid unknown by the method used in this experiment. She found that the equilibrum temperature of a mixture of ice and water was 1.0 degrees C on her thermometer. When she added 11.1 g of her unknown sample to the mixture, the temperature, after thorough stirring, fell to -3.0 degrees C. She then poured off the solution through a screen into a beaker. The mass of the solution was 90.4 g. Kf=1.86 degrees C/m 1. What is the freezing point depression? 2. What is the molality of the unknown solution? 3. How much unknown liquid was in the decanted solution?
Calculate the DGmix, DSmix, DHmix, and DVmix for a solution prepared by mixing 2 moles of benzene with 3 moles of toluene at 200C. Assume this mixture behaves ideally.
3. Refer to the phase diagram depicted below: When 7 moles of A and 3 moles of B are mixed at 50oC which is then cooled to 10oC the sample turns into two liquid phases, phase I has mole fraction xB=0.14 (see diagram below). Find the phase II mole fraction xB, and then calculate the ratio of amount of substance in phase I to that in phase II using Lever rule. Please enter your answer as a number with two decimals. for example, if the ratio you calculated is 2:3, you enter as 0.67
a) With reference to the molecules below, explain the factors which govern the watersolubility and melting points and explain the differences in the values observedbelow.b) You are a chemical engineer working in a pharmaceutical manufacturing plant.You’ve been tasked with scaling up the synthesis of a potential drug candidate.From previous studies, you know the following information about reaction takingplace:ΔHoreaction = -112.2kJΔS = -15.26JK-1mol-1ΔG = -18.81kJ Discuss the meaning of each term/value and what this tells you aboutthe nature of the reaction. Given the above information, briefly state the impact of low/hightemperatures on the above reaction.
What will be the new boilng point of 491ml benzene (Kb = 2.53 oC•Kg/mol; Bp = 80.1oC) when mixed with 11g of naphthalene (MW = 128.17 g/mol) to make a non- eletrolyte solution? Density of benzene = 0.876 g/ml) Round you answer in 2 decimal places, unit is not required.