'Pb 2' diaporamas de présentation

WRITING AP EQUATIONS

WRITING AP EQUATIONS. General Guidelines. AP equation sets are found in the free-response section of the AP test. You are expected to: write balanced net ionic equations for reactions when given the reactants answer a question or use the equation to solve for needed values.

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We have learnt that ionic compounds conduct electricity when molten or aqueous.

( Introduction ). ( Molten electrolyte ). ( Aqueous electrolyte ). ( Summary ). We have learnt that ionic compounds conduct electricity when molten or aqueous.

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Ionic solids dissolve in water to form saturated solutions.

Solubility Equilibria. Ionic solids dissolve in water to form saturated solutions. The extent to which they dissolve depends on the forces of attraction between the Ions. As the charges increase, the forces get stronger, the solubility decreases.

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Chemistry 120

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Ch. 15: Applications of Aqueous Equilibria

Ch. 15: Applications of Aqueous Equilibria. 15.4 Titrations and pH curves. Titration. used to find the concentration of a solution using a solution of known concentration _____________ solution with unknown concentration _____________ solution with known concentration

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Digestion

STEPS IN GRAVIMETRIC ANALYSIS. Preparation of the Sample. Precipitation. Digestion. Filtration and Washing. Calculation. Weighing. Drying or Ignition. Preparation of the solution Solid sample must be dissolved in a suitable solvent .

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Data Analysis and Presentation

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Chemical Equilibrium

Chemical Equilibrium. Complete and Reversible Reactions. Complete – Forms a precipitate or evolves gas, all reactants are used up Reversible - When products formed in a chemical reaction decompose back to the original reactants. Reversible Reactions. The arrows go in both directions

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Precipitation Titrations Dr. Riham Ali Hazzaa Analytical chemistry Petrochemical Engineering

Precipitation Titrations Dr. Riham Ali Hazzaa Analytical chemistry Petrochemical Engineering. Precipitation titration: It is a titration in which the reaction between the analyte and titrant involves a precipitation. SOLUBILITY RULES. Most nitrates are soluble

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The Solubility Product Constant, K sp

The Solubility Product Constant, K sp. Many ionic compounds are only slightly soluble in water and equations are written to represent the equilibrium between the compound and the ions present in a saturated aqueous solution. The equilibrium system is a heterogeneous system.

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Wen-Sheng Chung ( ??? ) Department of Applied Chemistry, National Chiao Tung University

?????????????? ????? December 24, 2011. Ditopic Fluorescent Sensing of Heavy Metal Ions Based on Functionalized Calix[4]arenes. Wen-Sheng Chung ( ??? ) Department of Applied Chemistry, National Chiao Tung University Hsinchu, Taiwan. (c). 1,3-alternatene. cone. partial cone.

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Application of Electrolytic Cells Lesson 11

Application of Electrolytic Cells Lesson 11. Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals . Many elements are made by electrolysis Pb Al Zn Na K Li H 2 Cl 2 F 2 I 2 O 2 Pb 2+ + 2e - ? Pb (s)

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Application of Electrolytic Cells Lesson 11

Application of Electrolytic Cells Lesson 11. Electrolysis describes what happens in an electrolytic cell and means to use electricity to make chemicals . Many elements are made by electrolysis Pb Al Zn Na K Li H 2 Cl 2 F 2 I 2 O 2 Pb 2+ + 2e - ? Pb (s)

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Carry out procedures to identify ions present in solution

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Equilibrium

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??? 99-5

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Qualitative Analysis Cations Internal Assessment 2.1- part one

Qualitative Analysis Cations Internal Assessment 2.1- part one. First step:. add 2 drops of dilute NaOH(aq). Record your results clearly. add 2 drops of dilute NaOH solution. no precipitate Na +. add 2 drops of dilute NaOH solution.

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?????????????. Northwest University. ?????? I ?????????????. ????. ??????????. ????. ???????? EDTA ?????? ? ??? EDTA ??????????. pH~ 10. ?????. pH 5~6. pH 1~2. ????. ?????????????????. pH = 1 ?????. ? EDTA ??. Bi 3+ Pb 2+. Bi(XO) Bi 3+ Pb 2+. BiY XO

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O 2-

Br 1-. Br 1-. Br. Br. K. e -. e -. Br 1-. Br 1-. bromine atom. potassium atom. e -. O 2-. potassium ion. bromide ion. Mg 2+. K 1+. K 1+. K 1+. K 1+. K. bromine atom. potassium atom. bromide ion. potassium ion. potassium bromide. KBr. magnesium bromide. potassium oxide.

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Fe Fe

VOLTAIC CELL SLIDE ONE OVERVIEW ANIMATION. 2e-. 2e-. VOLTMETER. 2e-. 2e-. Na +. SO 4 2-. Na +. SO 4 2-. SO 4 2-. Na + Na +. 2e-. Fe Fe. Pb. 2e-. -. Fe 2+. Pb 2+. Pb. Na + Na +. SO 4 2-. +. -. Pb 2+. Pb. -. +. -. +. Fe 0 (s) ? 2e - + Fe 2+.

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