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Can you name and describe the forces present once you mix H2O with MgCl2? Can you explain why they form too.
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- Consider the melting points of the substances below (see figures for two compounds). Explain the trend in melting point using your knowledge of intermolecular forces. (In the structures below, carbon is black, hydrogen is white, and oxygen is red.) Substance Melting Point (°C) Molar Mass (g/mol) Cl2 −102 71 Ethyl formate (CH3CH2OCHO) −80 74 Propionic acid (CH3CH2COOH) −20 74 Br2 −7.2 160● Explain why higher average kinetic energy results in higher vapor pressure in terms of IMFs.Based on the kinetic molecular model, solids usually have higher densities compare two liquids. However, ice , a solid form of H2O floats on liquid water which means ice is less dense than water. What do you think is the reason for this phenomenon? What is the biological significance of this concept?
- Which of the following substances possess an internal structure of its constituent molecules that contain almost no empty space but allow freedom of movement? O Liquid alcohol (CH;CH2OH) O Vaporized alcohol (CH;CH2OH) O Carbon dioxide gas Solid carbon dioxide (as dry ice)Two students plan and carry out an investigation to determine if ionic or covalent bonds have stronger intermolecular forces; they use salt and sugar. They collect the following data: Sugar (covalent) white Salt (ionic) white rough, very small grains rough, small grains soluble soluble melts easily does not melt Which of the following tests will most help them to infer the strength of intermolecular forces between ionic and covalent compounds? Color Texture, grain size Solubility in water Melting point 58°F Clear 99+Which of the following has a higher melting point: NH4NO3 or H2O? Explain your reasoning, including the attractive forces present in both compounds.
- Activity 2: 1. Refer to the chart below on physical properties of matter. Answer the questions and relate the intermolecular forces present among the species to explain the different properties exhibited by the substances. Melting and Boiling Points Molar Mass, g/mol Substance Melting Point, K Boiling Point, K Fluorine (F2) 38 53 85 Bromine (Br2) 160 266 332 Astatine (At2) 420 575 610 a. Which substance has the highest melting and boiling points? b. What intermolecular forces of interactions are present in each of the substances? c. How do the intermolecular forces present relate to the size of the substance? d. How do the strength of the intermolecular forces present in each species compare to each other? e. How does the strength of the intermolecular forces relate to the boiling and melting points of the substances?Because carbon and silicon are both elements in group 14 on the periodic table, we expect them to react with other elements in similar ways. To some extent, they do, but in some cases, carbon and silicon compounds that seem to have analogous structures have very different chemical characteristics. For example, carbon tetrachloride, CCl4, is very stable in the presence of water, but silicon tetrachloride, SiCl4, reacts quickly with water. The unbalanced equation for this reaction is SiCl4 + H2O → Si(OH)4 + HCl Balance this equation. Write a conversion factor that could be used to convert between moles of SiCl4 and moles of H2O. How many moles of SiCl4 react with 24 moles of water? Write a conversion factor that could be used to convert between moles of Si(OH)4 and moles of water. How many moles of Si(OH)4 form when 4.01 moles of H2O react with an excess of SiCl4?Which of the following gaseous substance would have the lowest solubility in water? CO2 H2 NH3 O2
