Final Review Answers
... a) Water evaporates faster at 40oC than at 20oC. More hydrogen bonds are breaking due to higher T. b) Propane (C3H8) boils at a lower temperature than water. Propane held together by weaker dispersion forces (NP). c) Oil is not soluble in water. Propane is nonpolar & is not attracted to polarity of ...
... a) Water evaporates faster at 40oC than at 20oC. More hydrogen bonds are breaking due to higher T. b) Propane (C3H8) boils at a lower temperature than water. Propane held together by weaker dispersion forces (NP). c) Oil is not soluble in water. Propane is nonpolar & is not attracted to polarity of ...
Electrochemistry
... -the oxidizing agent pulls electrons through the wire from the reducing agent. aka. electromotive force -unit is the volt: 1V = 1J of work per coulomb of charge (J/coulomb) -measured with a voltmeter: -drawing of current through a known resistance -or a potentiometer: measures opposition to current ...
... -the oxidizing agent pulls electrons through the wire from the reducing agent. aka. electromotive force -unit is the volt: 1V = 1J of work per coulomb of charge (J/coulomb) -measured with a voltmeter: -drawing of current through a known resistance -or a potentiometer: measures opposition to current ...
Hard water:
... DERIVATION OF NERNST EQUATION: The electrode potential and the emf of the cell depend upon the nature of the electrode, temperature and the activities (concentrations) of the ions in solution. The variation of electrode and cell potentials with concentration of ions in solution can be obtained from ...
... DERIVATION OF NERNST EQUATION: The electrode potential and the emf of the cell depend upon the nature of the electrode, temperature and the activities (concentrations) of the ions in solution. The variation of electrode and cell potentials with concentration of ions in solution can be obtained from ...
Properties of Systems in Equilibrium - Le
... where Qsp is called the solubility product reaction quotient. Note that, upon mixing two solutions, one containing A+ and the other containing B-, if Qsp < Ksp the system is not at equilibrium, but since no solid AxBy is present the reaction cannot shift to the right and therefore no reaction will b ...
... where Qsp is called the solubility product reaction quotient. Note that, upon mixing two solutions, one containing A+ and the other containing B-, if Qsp < Ksp the system is not at equilibrium, but since no solid AxBy is present the reaction cannot shift to the right and therefore no reaction will b ...
The Chemistry of Aqueous Systems
... P1 V1 P2 V2 (4.42 atm) (1 L) V1 X 4.42 L of air 1atm Solution: First, set up Boyle's Law equation: P1 equals 1 atm; V1 equals "X", P2 equals 65 psi and V2 equals 1 L. Remember, though, that you may not mix units. To bypass this fiasco, convert the 65 psi into atm (4.42 atm). Rearrange the eq ...
... P1 V1 P2 V2 (4.42 atm) (1 L) V1 X 4.42 L of air 1atm Solution: First, set up Boyle's Law equation: P1 equals 1 atm; V1 equals "X", P2 equals 65 psi and V2 equals 1 L. Remember, though, that you may not mix units. To bypass this fiasco, convert the 65 psi into atm (4.42 atm). Rearrange the eq ...
Problem Set: Empirical and Molecular Formulas
... 6. Titanium (IV) oxide, TiO2, is used as a pigment in paints and as a whitening and coating agent for paper. It can be made by reacting O2 with TiCl4. TiCl4 + O2 TiO2 + 2 Cl2 (already balanced) a) If 4.5 mol of TiCl4 react with 3.5 mol O2, identify both the limiting and excess reactants. b) How ma ...
... 6. Titanium (IV) oxide, TiO2, is used as a pigment in paints and as a whitening and coating agent for paper. It can be made by reacting O2 with TiCl4. TiCl4 + O2 TiO2 + 2 Cl2 (already balanced) a) If 4.5 mol of TiCl4 react with 3.5 mol O2, identify both the limiting and excess reactants. b) How ma ...
9. The Copigmentation Interactions between Strawberry
... reaction(Brouillard, 1983). The dependence of ln [(A - Ao)/Ao] on the copigmentconcentration ln [(A - Ao)/Ao] = f (ln[C]) is a straight line with a slope and intercept equal to n and ln [K], respectively. The equilibrium constant exhibited different values at different temperatures. Thermodynamic pa ...
... reaction(Brouillard, 1983). The dependence of ln [(A - Ao)/Ao] on the copigmentconcentration ln [(A - Ao)/Ao] = f (ln[C]) is a straight line with a slope and intercept equal to n and ln [K], respectively. The equilibrium constant exhibited different values at different temperatures. Thermodynamic pa ...
CHE 1400 Lab Manual - Al Akhawayn University
... a small volume. While we often say that lead is « heavy », what we really mean is that lead has a high density. Density is commonly given in terms of grams per milliliter (g/mL), although other units of mass and volume can be used. 3. Boiling point When a liquid is gradually heated, there is a point ...
... a small volume. While we often say that lead is « heavy », what we really mean is that lead has a high density. Density is commonly given in terms of grams per milliliter (g/mL), although other units of mass and volume can be used. 3. Boiling point When a liquid is gradually heated, there is a point ...
File
... c) NH4Cl (s) NH3 (g) + HCl(g) 5. At 25 °C, Kc =0.0146 for the following reaction: PCl5 PCl3 + Cl2 If, at equilibrium, the molar concentrations for PCl5 and PCl3 are 0.500 M and 0.200 M respectfully, calculate the concentration of chlorine gas. (0.0365M) 6. Consider the reaction: CO + 2H2 CH ...
... c) NH4Cl (s) NH3 (g) + HCl(g) 5. At 25 °C, Kc =0.0146 for the following reaction: PCl5 PCl3 + Cl2 If, at equilibrium, the molar concentrations for PCl5 and PCl3 are 0.500 M and 0.200 M respectfully, calculate the concentration of chlorine gas. (0.0365M) 6. Consider the reaction: CO + 2H2 CH ...
Pages from PS 11 Textbook for Lab
... 100.0 mL of solution in a coffee-cup calorimeter. The HCl is sufficiently concentrated so that the Mg completely reacts. The temperature of the solution rises from 25.6°C to 32.8 °C as a result of the reaction. Find ∆Hrxn for the reaction as written. Use 1.00 g/mL as the density of the solution and ...
... 100.0 mL of solution in a coffee-cup calorimeter. The HCl is sufficiently concentrated so that the Mg completely reacts. The temperature of the solution rises from 25.6°C to 32.8 °C as a result of the reaction. Find ∆Hrxn for the reaction as written. Use 1.00 g/mL as the density of the solution and ...
Naming Ionic Compounds 16 Naming Ionic Compounds
... What are the structural units that make up ionic compounds and how are they named? ...
... What are the structural units that make up ionic compounds and how are they named? ...
Uranyl Ion Complexes with Ammoniobenzoates as
... atoms being thus in pentagonal bipyramidal environments. The average U–O bond lengths for oxo, hydroxo, bridging carboxylate, chelating carboxylate and water ligands are unexceptional, at 2.27(4), 2.34(5), 2.39(6), 2.495(13) and 2.50(6) Å, respectively. Although this tetranuclear motif is very close ...
... atoms being thus in pentagonal bipyramidal environments. The average U–O bond lengths for oxo, hydroxo, bridging carboxylate, chelating carboxylate and water ligands are unexceptional, at 2.27(4), 2.34(5), 2.39(6), 2.495(13) and 2.50(6) Å, respectively. Although this tetranuclear motif is very close ...
Amounts of Reactants and Products
... b) Baking soda is often used as an antacid. It neutralizes excess hydrochloric acid secreted by the stomach: NaHCO3 (s) + HCl (aq) NaCl (aq) + H2O (l) + CO2 (aq) Milk of magnesia, which is an aqueous suspension of magnesium hydroxide, is also used as an antacid: Mg(OH)2 (s) + 2HCl (aq) 2H2O (l) ...
... b) Baking soda is often used as an antacid. It neutralizes excess hydrochloric acid secreted by the stomach: NaHCO3 (s) + HCl (aq) NaCl (aq) + H2O (l) + CO2 (aq) Milk of magnesia, which is an aqueous suspension of magnesium hydroxide, is also used as an antacid: Mg(OH)2 (s) + 2HCl (aq) 2H2O (l) ...
Prep UK-intro.p65
... The aim of the scientific committee has been that as many as possible of the preparatory problems should take their starting point in issues of general chemical, public or environmental interest. Therefore some of the problems cover several topics from the International Chemistry Olympiad. We have a ...
... The aim of the scientific committee has been that as many as possible of the preparatory problems should take their starting point in issues of general chemical, public or environmental interest. Therefore some of the problems cover several topics from the International Chemistry Olympiad. We have a ...
PH
In chemistry, pH (/piːˈeɪtʃ/) is a numeric scale used to specify the acidity or alkalinity of an aqueous solution. It is the negative of the logarithm to base 10 of the activity of the hydrogen ion. Solutions with a pH less than 7 are acidic and solutions with a pH greater than 7 are alkaline or basic. Pure water is neutral, being neither an acid nor a base. Contrary to popular belief, the pH value can be less than 0 or greater than 14 for very strong acids and bases respectively.pH measurements are important in medicine, biology, chemistry, agriculture, forestry, food science, environmental science, oceanography, civil engineering, chemical engineering, nutrition, water treatment & water purification, and many other applications. The pH scale is traceable to a set of standard solutions whose pH is established by international agreement.Primary pH standard values are determined using a concentration cell with transference, by measuring the potential difference between a hydrogen electrode and a standard electrode such as the silver chloride electrode.The pH of aqueous solutions can be measured with a glass electrode and a pH meter, or indicator.pH is the negative of the logarithm to base 10 of the activity of the (solvated) hydronium ion, more often (albeit somewhat inaccurately) expressed as the measure of the hydronium ion concentration.The rest of this article uses the technically correct word ""base"" and its inflections in place of ""alkaline"", which specifically refers to a base dissolved in water, and its inflections.