(a) Sodium hydroxide NaOH (b) Potassium nitrate KNO3 (c) Magnesium sulfate MgSO4 (d) Aluminum phosphate AlPO4 (e) Aluminum nitrate Al(NO3)3 (f) Ammonium nitrate NH4NO3 25. Name each of the following binary ionic compounds. (a) NaBr sodium bromide (b) MgS magnesium sulfide (c) CaO calcium oxide (d) MgCl2 magnesium chloride (e) AlF3 aluminum fluoride (f) CaI2 calcium iodide 26. Name each of the following binary molecular compounds. (a) O2F2 dioxygen difluoride (b) SiF4 silicon tetrafluoride
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reaction. After the reactants were mixed in the tube a cloudy yellow liquid formed indicating the formation of solid Iron Phosphate. The Iron cation followed the generally insoluble rule of the Phosphate anion. 4. Chloride‚ nitrate‚ sulfate‚ and bromide are generally soluble anions. Phosphate‚ hydroxide‚ and carbonate are generally insoluble anions. Potassium‚ Sodium‚ and Ammonium are always soluble cations. Iron‚
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www.igcse.at.ua ORGANIC CHEMISTRY OIL and its many useful PRODUCTS The origin of oil Crude oil is formed from organic material of the remains of plant and animal organisms that lived millions of years ago. These remains form sediments eg at the bottom of seas‚ and become buried under layers of sedimentary rock. They decay‚ without air (oxygen)‚ under the action of heat and pressure to form crude oil over millions of years. It is a fossil fuel because it is formed from
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4-tert-butyl-2-ethyl-1-methylcyclohexane (ignore mirror images) in their most stable conformations. Arrange the structures from the least stable to the most stable. 6. Cyclohexylmethanol and 1-methylcyclohexanol are converted to their corresponding bromides. Write a suitable mechanism for each reaction‚ and assign each the appropriate symbol (SN1 or SN2). OH O H H Br H + :Br : SN2 :Br : O H H Br + H2O OH O H Br O + H2O + :Br : SN1 :Br
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LESSON PLAN FOR III-PEARL (CHEMISTRY) FORMULA WRITING AND NAMING OF COMPOUNDS OBJECTIVES: (1) Classify ions according to their composition‚ charge‚ and oxidation number (2) Define chemical formula (3) Explain the importance of representing ions‚ elements and compounds using chemical formulas (4) Write and name chemical formulas of compounds using the Stock System and Classical System MATERIALS: power point presentation videos flashcards textbook
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____ 2. 2s22p6 B. Which has the lowest first ionization energy? ____ 3. D = 2s22p5 C. Which is a noble gas? 10. Convert 4.3 kilograms to centigrams using dimensional analysis. 11. Consider the elements neon‚ bromine‚ and phosphorus. Which has five electrons in its 4p sublevel? 12. Write the formula obtained when this atoms loses or gains valence electrons and becomes an ion. Tell whether it is a cation or an anion. Be 13
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Who discovered the element? Selenium was discovered by Jons Jacob Berzelius in 1817. How was the element discovered? Selenium was discovered by Jons Jakob Berzelius in 1817. In 1817‚ he was studying the chemicals used in making sulfuric acid‚ but they got selenium from a red-brown sediment which collected at the bottom of the chambers in the particular plant. At first he thought it was the element tellurium and tellurium is a rare element‚ so he brought it back to his laboratory. After studying
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CHEM3412 Synthesis of a Porphyrin Porphyrins are hetereonuclear‚ macrocyclic compounds that play an important role in living organisms. Examples include the non-protein heme portion of hemoglobin in animals whereby the lone pairs on nitrogen can bind to the oxygen-carrying iron. In plants‚ chlorophyll uses the vast conjugation to allow absorption of light for photosynthesis. The characteristic colors of porphyrins is also due to the conjugation. An examination of the porphyrin structure
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hydrocarbon C4H10 (A) on monochlorination gives a compound C4H9C1 (B). Compound (B) on treatment with sodium metal gives 2‚2 ‚3‚3- tetramethylbutane. What are the structural formulas of (A) and (B)? 8. a) A hydrocarbon of formula C6H12 decolorises bromine solution‚ dissolves in concentrated sulphuric acid‚ yields 2-methylpentane on hydrogenation and on ozonolysis gives formaldehyde and 3- methylbutanal. What is the
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(100) Convert each of the following. (Chapter 3) a. 4.72 g to mgHint b. 2.7 × 103 cm/s to km/hHint c. 4.4 mm to dmHint (101) How many protons‚ electrons‚ and neutrons are in each isotope? (Chapter 4) a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123 (102) Write the complete electron configuration for each atom. (Chapter 5) a. fluorine b. lithium c. rubidium (103) Why do the elements magnesium and barium have similar chemical and physical properties? (Chapter 6) (104)
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