L Caco 3

Carbon Dioxide, Alkalinity and pH

2-→ CaCO 3 Does this reduce the CO 2 (P CO2) level of the seawater? Hint: when pH is between 7.5 and 8.5: CO 2(aq) + CO 3-2 + H 2 O ↔ 2HCO 3-No! Lost CO 3 2-will be replaced: HCO 3-→CO 3 2-+ H+ But this H+ release causes: HCO 3-+ H+ → CO 2 + H 2O Thus, CaCO 3 precipitation causes a decrease in Total CO 2, but an increase in P CO2 CO 2(g ...

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AP Chemistry 2019 Free-Response Questions

The student filters and dries the precipitate of CaCO: 3 (molar mass 100.1 g/mol) and records the data in the table : below. Volume of Na: 2: CO: 3: solution 50.0 mL : Volume of 1.0 : M: Ca(NO: 3) 2: added 100.0 mL : Mass of CaCO: 3: precipitate collected 0.93 g (c) Determine the number of moles of Na: 2: CO: 3 :

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S°) FOR CHEMICALS (non-math)

CaCO 3(s) 92.88 CaO(s) 39.75 CO 2(g) 213.6 a. +7.2 J/K d. +160.5 J/K b. –160.5 J/K e. +3.57 J/K c. +35.7 J/K 15. What is the standard entropy change when 10.0 g of methane reacts with 10.0 g of oxygen? CH 4(g) + 2O 2(g) → CO 2(g) + 2H 2O() Substance S° ...

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Unit 9 Chemical Equations and Reactions

4 CaCO 3 (s) → CaO (s) + CO 2 (g) ***These reactions often require an energy source as an initiator. Energy sources can be heat, light, or electricity. They are usually _____ ENDOTHERMIC,____. One example of a decomposition reaction is the electrolysis of water to make oxygen and

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Big-Picture Introductory Conceptual Questions

3 Writing the Equilibrium Constant. Reminder: solutes (aq) or gases (g) appear; solvents (l) or solids (s) do not. 11. Write an expression for the equilibrium constant for the formation of two moles of ammonia gas (NH3) from nitrogen and hydrogen in their standard states. N 2(g) + 3 H 2(g) 2 NH 3(g) 12.