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When water dissolves MgCl2(s), which end, if either, of water molecule’s dipole is expected to be near to
a. A Mg2+ ion?
b. A Cl- ion?
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- Which of the following statements is/are correct? l. Water is good at dissolving ions and polar molecules, but poor at dissolving nonpolar molecules. ll. A polar molecule is one that is uncharged, but has an asymmetric internal distribution of charge, leading to partially positive and partially negative regions. lll. Water interacts differently with charged and polar substances than with nonpolar substances because of the polarity of its own molecules. lV. Water molecules are polar, with partial positive charges on the hydrogen, a partial, and negative charge on the oxygen.1. Which of the following words describe BEST the statements given below? C. Heat Capacity D. Polar A. Adhesion B. Cohesion I. The reason the molecular structure of water has a charge. II. Amount of energy needed to change the temperature of a substance. III. Molecular attraction in which a water sticks to other, unlike substances. IV. Molecular attraction in which water sticks to itself. Answer these questions: 2. Why does a water molecule have polarity? 3. What are the physical and chemical properties of water that make it so unique and necessary for living things? 4. Why is water called the universal solvent? 5. Colligative Properties: Discuss the phase diagram belowThis figure shows a group of water molecules. Ⓒ Mac H- H H :-H How many water molecules are in this image? number of water molecules: How many covalent bonds are present in each molecule? number of covalent bonds: H H :0-H :0-H
- For each compound in the table below, decide whether there would be any hydrogen-bondir of the compound and molecules of water. compound hydrogen-bonding force Between Between molecules of formula or Lewis molecules of the compound? the compound and molecules of water? name structure H :O: yes yes acetic acid Н-с — с — о — н no no H. yes yes formyl chloride CHOCI no no H yes yes methanol H - C-0- H no no H.Chemistry Consider the following sketch of the interaction energy for two atoms as a function of distance between the atoms. 4 -132-191 Which label, a) to e) points to the region where the attraction between the nuclei and electrons is dominating the interaction? Select one: a. O O O O O b. d.Water is considered the solvent of life. Water's polarity makes it unique, and this polarity is responsible for the life giving properties of water. In this short essay question, answer only one of the following questions, A OR B. In your first sentence, tell me if your answer is for A or B. NOTE that saying "water is polar, so it is cohesive", or "water is polar, so it moderates temperature", or "water is polar, so is more dense as liquid", with a description of how that life giving property is beneficial to life, does NOT answer this question! You must explain, in your OWN words, HOW the polarity of the water is mechanistically responsible for the life giving property you choose. Question B: Explain in detail how the polar nature of water allows fish to survive and swim around in the watery depths of Lake Baikal, Russia, all winter long in spite of the average air temperatures of minus 25 degrees Celsius in this frozen, snow covered region. What life giving property of water is…
- Review Question 11.28 In a polar covalent bond, how do you determine which atom has a partial negative charge (5-) and which has a partial positive charge (8+)? The more electronegative atom in the bond between two atoms will more strongly attract electrons so it will have a partial charge because the charge. The less electronegative atom will have a partial bonding pair of electrons has been pulled away by the more electronegative atom.L A Moving to another question will save this response. Question 6 For collisions to be successful, reactants must have O a. favorable geometry only ☐ b. sufficient heat of reaction only ☐ c. sufficient kinetic energy and favourable geometry ☐ d. sufficient potential energy only A Moving to another question will save this response. SOL½ O +†^: Show the curved arrows between propan-2-ide and water. COP + D.. :I Jil See Periodic Table See Hint Н HUZ C N 0 S F P CI Br I
- For each compound in the table below, decide whether there would be any hydrogen-bonding force between molecules of the compound, or between molecules of the compound and molecules of water. name formic acid compound dibromomethane acetic acid formula or Lewis structure :0: || H-C-O-H CH₂Br₂ H :0: | || H-C-C-O-H H Between molecules of the compound? 00 00 yes no yes no yes hydrogen-bonding force no Between molecules of the compound and molecules of water? 00 00 yes no yes no yes no XWater and oil do not mix because Both water and oil are nonpolar O Both water and oil are nonpolar O Water is polar , oil is nonpolar Water is nonpolar , oil is polarWhich among these statements is incorrect? a. Water is made up of elements hydrogen and oxygen. b. In H2O, 4 of the six outer-shell electrons of Oxygen are used in bonding with Hydrogen. c. Water is considered a polar molecule due to its bent structure. d. None of the above.