they can be beaten in to thin sheets is called- a. malleability b. Ductility c. conduction d. Expansion Ans . 1. (a) 2. Which one of the following is metal? a. C b. N c. Na d. O Ans . 2. (c) 3. Which one of the following is non metal? a. Zn b. Al c. Fe d. N Ans . 3. (d) 4. All materials shown property of malleability expect a. Iron b. Graphite c. Aluminium d. Silver Ans . 4. (b) 5. Which one of the following is a good conductor of electricity? a. Iron b. Plastic c. Wood
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Clays are one of the important natural materials‚ which have been examined for catalytic applications. Clays are characterized by a layered structure and hence they are slippery when wet. They are broadly classified as cationic or smectite type (having layer lattice structure in which two-dimensional oxyanions are separated by layers of hydrated cations) and anionic or brucite type (in which the charge on the layer and the gallery ion is reversed complimentary to smectite type). Anionic clays are
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and Oxygen LEORA GEROA Mg – reducing agent O2 – oxidizing agent Return to TOC Copyright © Cengage Learning. All rights reserved 8 Section 10.9 Oxidation–Reduction Reactions Reaction of Zinc and Copper (II) Sulfate Zn – reducing agent CuSO4 – oxidizing agent Copyright © Cengage Learning. All rights reserved Return to TOC 9 Section 10.9 Oxidation–Reduction Reactions Oxidation number or Oxidation State • signifies the number of charges the atom would have in
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5070 Paper 21 A1 Allow correct name but formula takes precedence (a) V2O5 (1) (b) ZnSO4 (1) (c) AgI (1) (d) CF3Cl3 (1) (e) (NH4)2SO4 / ZnSO4 (1) (f) CH4 (1) (g) (NH4)2SO4 (1) [1] [1] [1] [1] [1] [1] [1] [Total: 7] A2 (a) sulfur dioxide (1) Allow SO2 (b) copper(II) sulfate (1) Allow CuSO4 (c) H+ + OH– → H2O (1) Ignore state symbols (d) (i) Copper(II) hydroxide (1) Allow Cu(OH)2 (ii) Cu2+(aq) + 2OH–(aq) → Cu(OH)2(s) Balanced equation (1) Correct state symbols (1) [1] [1] [1] [1]
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Honors Chemistry Final Exam Study Guide Multiple Choice- (51 points @ 1/2 point ea.) Identify the letter of the choice that best completes the statement or answers the question. ____ 1. The pair of elements that forms a bond with the least ionic character is |a. |Na and Cl. |c. |O and Cl. | |b. |K and Cl. |d. |Mg and Cl.
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Yes A6 NaOH Sodium Hydroxide AhNO3 Silver Nitrate Turned Brown Yes B1 AgNO3 Silver Nitrate NH4OH Aqueous Ammonia Observation 1: Turned Cloudy Absorb in paper towel & expose to sunlight Observation 2: no reaction noted yes B2 NH4OH Aqueous Ammonia CuSO4 Copper Sulfate The reaction turned light blue Yes QUESTIONS Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). Using your results from Data Table 1 as a guide‚ how would you test this material
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Chem 17 ▪ General Chemistry Laboratory II Experiment 1 Calorimetry INTRODUCTION Chemical reactions are usually accompanied by the evolution (exothermic reaction) or absorption (endothermic reaction) of heat energy. When measured at constant pressure‚ the heat evolved (qp < 0) or absorbed (qp > 0) is equal to the enthalpy change‚ symbolized by ΔH. ΔH is positive for an endothermic process and negative for an exothermic one. If H f is the enthalpy of the final state and Hi of the initial state
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Na2SO4 into well A1 of the 24-well plate. 3. Place 10 drops of Magnesium sulfate‚ Mg SO4 into well A2 of the 24-well plate. 4. Place 10 drops of Zinc nitrate‚ Zn(NO3)2 into well A3 of the 24-well plate. 5. Place 10 drops of Iron (III) chloride‚ FeCl3 into well A4 of the 24-well plate. 6. Place 10 drops of Copper (II) sulfate‚ Cu SO4 into well A5 of the 24-well plate. 7. Take the metal solids from your LabPaq 8. Use your tweezers to pick up and carefully insert the piece of magnesium into
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HCl Hydrochloric Acid C20H14O4 Phenolphthalein A6 NaOH Sodium Hydroxide AgNO3 Silver Nitrate B1 AgNO3 Silver Nitrate NH4OH Aqueous Ammonia Observation 1: + Absorb in paper towel and expose to sunlight Observation 2: B2 NH4OH Aqueous Ammonia CuSO4 Copper Sulfate Questions A. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). Using your results from Data Table 1 as a guide‚ how would you test this material for the presence of sodium bicarbonate
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soluble Chloride (Cl-)‚ Bromide (Br-)‚ Iodide (I-) + Ag+‚ Pb2+‚ Hg2+‚ Cu+‚ Tl+ = low solubility (insoluble) silver chloride‚ AgCl‚ forms a white precipitate + any other cation = soluble potassium bromide‚ KBr‚ is soluble Sulfate (SO42-) + Ca2+‚ Sr2+‚ Ba2+‚ Ag2+‚ Pb2+‚ Ra2+‚ Hg2+ = low solubility (insoluble) barium sulfate‚ BaSO4‚ forms a white precipitate + any other cation = soluble copper sulfate‚ CuSO4‚ is soluble sulfide (S2-) + alkali ions (Li+‚ Na+‚ K+‚ Rb+‚ Cs+
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