Seashells are mostly calcium carbonate, which reacts with H₃O⁺ according to the equation CaCO₃(s)+H₃O⁺(aq) ⇌Ca²⁺(aq)+HCO₃⁻(aq)+H₂O(l) If Kᵥᵥ increases at higher pressure, will seashells dissolve more rapidly near the surface of the ocean or at great depths? Explain
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Seashells are mostly calcium carbonate, which reacts with H₃O⁺ according to the equation CaCO₃(s)+H₃O⁺(aq) ⇌Ca²⁺(aq)+HCO₃⁻(aq)+H₂O(l) If Kᵥᵥ increases at higher pressure, will seashells dissolve more rapidly near the surface of the ocean or at great depths? Explain
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- Acidic water can be treated with basic substances to increase the pH, although such a procedure is usually only a temporary cure. Calculate the minimum mass of lime, CaO, needed to adjust the pH of a small lake 1V = 4 * 109 L2 from 5.0 to 6.5. Why might more lime be needed?Write the reaction quotient, Qc, for each of the following reactions:(a) The first step in nitric acid production, NH3(g) + O2(g) ⇌ NO(g) + H2O(g)(b) The disproportionation of nitrogen monoxide, NO(g) ⇌ N2O(g) + NO2(g)Calculate the standard reaction free energy of the following chemical reaction: N2(g)+O2(g)——> 2NO(g)
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- Calculate the equilibrium constant for the reaction: NO2 (g) + NO (g) N2O (g) + O2 (g)Hydrogen peroxide can be prepared in several ways. One method is the reaction between hydrogen and oxygen, another method is the reaction between water and oxygen. Calculate the AGxn of each reaction using values from the table of thermodynamic properties. (1) H₂(g) + O₂(g) → H₂0₂ (1) AGixn = (2) H₂O(l) + O₂(g) ⇒ H₂O₂ (1) AGixn = Which method requires less energy under standard conditions? reaction (1) reaction (2) kJ.mol-1 kJ.mol-¹Calculate the pH of a 0.055 M AlCl3 (aq) (aluminum chloride) solution. Ka for Al3+ is 1.2 × 10–5.
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