Test 2 Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Find the combination that will give a gas as a product A. AgNO3(aq) + NaI(aq) B. HCl(aq) + Na2CO3 (aq) C. MgCl2(aq) + K2CO 3 (aq) D. CaSO4 (aq) + (NH4)3 PO4(aq) 1) A) A B) C C) B D) D 2) 2) The balanced molecular equation for complete neutralization of H2 SO4 by KOH in aqueous solution is __________. A) 2H+ (aq) + 2OH- (aq)
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Chemistry Final Study Guide Matter as anything that has mass and takes up space. Significant figures refers to digits that were measured. When rounding calculated numbers‚ we pay attention to significant figures so we do not overstate the accuracy of our answers. Rules: -All nonzero digits are significant. -Zeroes between two significant figures are themselves significant. -Zeroes at the beginning of a number are never significant. -Zeroes at the end of a number are significant if a decimal
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Introduction: In my coursework I will be mainly concentrating on the reaction between dilute hydrochloric acid with marble chips (calcium carbonate). Calcium carbonate (marble chips) + hydrochloric acid ==> calcium chloride + water + carbon dioxide CaCO3(s) + 2HCl (aq) ==> CaCl2 (aq) + H2O (l) + CO2 (g) Aim: The aim of the experiment is to investigate how the concentration of hydrochloric acid affects the rate of reaction with marble chips‚ i.e. how quickly/how much hydrogen is produced. Firstly
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Ba(OH)2.8H2O‚ FW = 315.48‚ Eq. = 157.5g/l 250ml 0.05M = 3.94g = 0.1N | Benzoic acid C6H5COOH‚ FW = 122.12‚ Eq. = 61g/l 250ml 0.05M = 1.52g = 0.1N | Calcium carbonate CaCO3‚ FW = 100.00‚ Eq. = 50g/l 250ml 0.05M = 1.25g = 0.1N | Furroic acid FW = 112.08‚ Eq. = 112g/l 250ml 0.1M = 2.8g = 0.1N | Hydrochloric acid HCl‚ FW = 36.5‚ Density = 1.2 1M = 83mls = 1N (Use 86mls) 250ml 0.1M = 2mls = 0.1N 1 liter 0.1M soln = 8.6mls = 0.1N | Oxalic acid H2C2O4.2H2O‚ FW = 126.07‚ Eq. = 63g/l 250ml
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+ 2 HCl (aq) → 2NaCl(aq) + H2O(l) + CO2 (g)KA3 + KA1 : NaHCO3 (s) + HCl (aq) → NaCl (aq) + H2O (l) + CO2 (g)(e) Energy Na2CO3 (s) + 2 HCl (aq) + H2O (l) + CO2 (g)HKA2 / kJ H 2 x HKA3 2 NaCl (aq) + 2 H2O (l) + 2 CO2 (g) 2 NaHCO3 (s) + 2 HCl (aq)(f) Na2CO3(s) + 2 HCl (aq) → 2NaCl(aq) + H2O(l) + CO2 (g) [1] HKA2 = - P kJ NaHCO3 (s) + HCl (aq) → NaCl (aq) + H2O (l) + CO2 (g) [2] HKA3 = + Q kJ Reverse equation [1]2NaCl(aq) + H2O(l) + CO2 (g) → Na2CO3(s) + 2 HCl (aq)
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increase or decrease in concentration. ("a" is done as an example.) a) Mg(s) + 2HCl(aq) H2(g) + MgCl2(aq) reaction rate = mass of Mg consumed unit time b) c) or reaction rate = volume of H2 produced unit time or reaction rate = decrease in [HCl] unit time or reaction rate = increase in [MgCl2] unit time AgNO3(aq) + NaCl(aq) C(s) + O2(g) 1 NaNO3(aq) + AgCl(s) CO2(g) 2. For each of the following reactions find a quantity or property which could be monitored in order to measure the rate
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Chapter 11 Section Assessments Section 11.1 7. How do you write a word equation? To write a word equation‚ write the names of the reactants separated by plus signs followed by an arrow‚ and followed by the names of the products separated by plus signs. 8. How do you write a skeleton equation? To write a skeleton equation‚ write the formulas of the reactants to the left of the arrow and the formulas of the products to the right of the arrow. 9. Describe the steps in writing a balanced chemical
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Module No. 6 Energy Relationships in Chemical Reactions The Nature of Energy and Types of Energy Energy – is the capacity to do work or to transfer heats. Forms of Energy 1. Kinetic energy 2. Radiant energy 3. Thermal energy 4. Chemical energy 5. Potential energy Energy Changes in Chemical Reactions Heat – is the transfer of thermal energy between two bodies that are at different temperature. Thermochemistry – is the study of heat
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the solution of sodium chloride. Ans:- (i) BaCl2 (aq) + Na2SO4 (aq) →BaSO4 (s) + 2NaCl (aq) (ii) Sodium hydroxide solution (in water) react with hydrochloric acid solution (in water) to produce sodium chloride and water. Ans. (ii) NaOH (aq) + HCl (aq) → NaCl (aq) + H2O (liq) Q.4. A reaction of a substance X is used for white washing. (i) Name the substance X and write its formula. Ans.The substance X is lime which
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E A. H2O B. N2 C. KOH D. C2H6O (ethanol) E. CH3COOH (acetic acid) Answer: C 4.3 Which of the following compounds is a weak electrolyte? E A. HCl B. CH3COOH (acetic acid) C. C6H12O6 (glucose) D. O2 E. NaCl Answer: B 4.4 Which of the following compounds is a weak electrolyte? E A. HCl B. NH3 C. C6H12O6 (glucose) D. N2 E. KCl Answer: B 4.5 Which of the following compounds is a nonelectrolyte? E A. NaF B. HNO3 C. CH3COOH (acetic
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