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Take the solution 10.12g, add 10mL of deionized water, and cool the solution to 0 degrees Celsius. How much CuSO4, 5H2O crystallizes out?
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- Are changes in state physical or chemical changes? Explain. What type of forces must be overcome to melt or vaporize a substance (are these forces intramolecular or intermolecular)? Define the molar heat of fusion and molar heat of vaporization. Why is the molar heat of vaporization of water so much larger than its molar heat of fusion? Why does the boiling point of a liquid vary with altitude?● One mole of water weighs 18 g at 4 °C. True FalsePredict the temperature at which CuSO4·5H2O undergoes dehydration. CuSO4·5H2O (s) <=> CuSO4 (s) + 5H2O (g) ΔfHo -2280 -771 -242 kJ mol-1 Smo 300 109 189 J K-1 mol-1 T >= ______ K. 3 sig. fig.
- How many hypochlorite ions are present in 1.50 gal of bleach solution? (1gal=3.785L) Write the balanced chemical equation for the preparation of bleach. Express your answer as a chemical equation. Identify all of the phases in your answer. How many grams of NaOHare required to produce the sodium hypochlorite for 1.50 gal of bleach? If 165 g of Cl2 is passed through a solution containing 275 g of NaOH and 162 g of sodium hypochlorite is produced, what is the percent yield for the reaction?2. Why does the temperature of a mixture of ice and water remain constant during melting and freezing?What is the intermolecular force which explains the fact that water (H2O, mass = 18 amu) has a melting temperature of 0oC and oxygen (O2, mass = 32 amu) has a melting temperature of only -219oC?
- 2- Below information is given for nickel. Atomic weight of Ni: 58.7 g/mol Melting temperature: 1455 °C Enthalpy of melting: 17650 J/mol Density of solid Ni: 8.9 g/cm • Density of liquid Ni: 7.9 g/cm • Icm'atm = 0.1013J b) Draw and explain the P-T diagram of pure nickel.04/22/ 2021 ot art e b NAME Kouri KulRu DATE SECTION POSTLABORATORY ASSIGNMENT 1. Calculate the theoretical percentage of water for the following hydrates. (a) manganese(II) monohydrate, MnSO4 • H2O (b) manganese(II) tetrahydrate, MNSO4 • 4H2O 2. An unknown hydrate, AC• XH»O, has a mass of 1 .00 g before heating, and 0.738 g atter heating. What is the experimental percentage of water in the hydrate? ombvl lo slmo noihesilla logataW If the anhydrous compound (AC) has a molar mass of 101 g/mol, what is the water of crystallization (X) and the formula for the hydrate (AC XH,O)?ouphut suf (snoilgo) ai sh Formula of hydrate AC H20 Water of crystallizationA dry-cleaning plant used carbon tetrachloride (CCl4) as a cleaning solvent until it was shut down because CCl4 was found to cause cancer and had been leaking into the groundwater. The plant owner offered to switch to liquified carbon dioxide instead and was allowed to reopen. Within 6 months cancer cases returned to normal. Explain whether the use of liquified carbon dioxide is a long term, safer environmental alternative to CCl4.
- 1.A hydrogen gas thermometer is found to have a volume of 2000 cm3 when placed in an ice-water bath at 0°C at 1 atm. When the same thermometer is immersed in boiling liquid chlorine, the volume of hydrogen at 740 mmHg pressure is found to be 1500 cm3. What is the temperature of the boiling point of chlorine?How much heat, in joules and in calories, must be added to a 89.1 g chromium block with a specific heat of 0.450 J/g·°C to increase its temperature from 25°C to its melting temperature of 1907°C?A: 4.91 g of LiCl was dissolved in 50.0 mL of water in the same calorimeter as in problem 1. Analysis of the thermogram showed the initial temperature to be 22.9°C, the final temperature to be 49.2°C. Was the dissolution of the ionic solid exothermic or endothermic? B: Using the information above, calculate the mass of the water. C: Calculate ΔHsolution D : Calculate the standard molar enthalpy of solution. Assume that the pressure is 1 bar.
