Recent questions in Chemistry

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How does adding a substituent to a molecule affect its excitation energy? Use quantum chemical calculations to compare the excitation energies of a set of closely related molecules, one with a substituent and one without, and determine the effect of the substituent on the molecules' excited states.

asked Jan 30 in Computational Chemistry by LoisPenny954 (570 points)

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1 answer 57 views

What would be the effect of adding a strong base to a solution of acetic acid, and how would this impact the equilibrium concentration of acetate ions and hydrogen ions?

asked Jan 30 in Chemical equilibrium by Juliet26542 (450 points)

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1 answer 54 views

How does adding a strong acid affect the ionization of a weak acid in a chemical equilibrium system? Provide an example and explain the reasoning behind your answer.

asked Jan 30 in Chemical equilibrium by Newton78P742 (530 points)

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1 answer 36 views

How does adding a strong acid or base affect the pH and equilibrium concentration of a weak acid or base such as acetic acid in a solution and how can we predict these changes using the equilibrium constant expression?

asked Jan 30 in Chemical equilibrium by LesleyStyers (670 points)

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1 answer 63 views

What is the effect of adding a small amount of nickel to a titanium alloy on the strength and corrosion resistance of the alloy, and how does this influence its suitability for aerospace applications?

asked Jan 30 in Materials Chemistry by CarissaDelli (270 points)

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1 answer 70 views

What is the effect of adding a methyl group to a benzene ring on its electronic transport properties, as predicted by density functional theory calculations, and how does this relate to its potential use in organic electronic devices?

asked Jan 30 in Computational Chemistry by GrantBucher (230 points)

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1 answer 61 views

How does adding a known concentration of a specific reaction intermediate affect the rate of a chemical reaction, and what is the mechanism behind this observed effect?

asked Jan 30 in Chemical kinetics by PenniLoane3 (510 points)

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1 answer 61 views

What is the effect of adding a catalyst, specifically platinum, on the equilibrium position of the redox reaction between iodine and thiosulfate? Calculate the new equilibrium constant and explain the observed changes in the reaction rate and yield.

asked Jan 30 in Chemical equilibrium by Sharon57F646 (470 points)

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1 answer 72 views

What is the effect of adding a catalyst on the equilibrium position of a redox reaction in which the products have a higher number of moles than the reactants? Provide a numerical example to support your answer.

asked Jan 30 in Chemical equilibrium by AnibalTimm8 (550 points)

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1 answer 52 views

What is the effect of adding a catalyst on the equilibrium position of a redox reaction between potassium permanganate and oxalic acid? Provide a detailed explanation and calculations to support your answer.

asked Jan 30 in Chemical equilibrium by EnriquetaWhe (710 points)

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1 answer 63 views

What is the effect of adding a catalyst on the equilibrium position of a redox reaction between iron and copper ions in a solution at room temperature, and how would the equilibrium constant be affected by the addition of the catalyst?

asked Jan 30 in Chemical equilibrium by CathernVanbu (470 points)

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1 answer 67 views

What is the effect of adding a catalyst on the equilibrium position of a reaction system, given the initial concentrations and temperature of the reactants and products? Use the equilibrium constant expression and Le Chatelier's principle to explain your answer. Provide an example of a reaction where a catalyst can be used to shift the equilibrium position.

asked Jan 30 in Chemical equilibrium by JaiManzer649 (370 points)

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1 answer 78 views

How much would the equilibrium constant (Kc) change if a catalyst is added to the reaction system, given the initial concentration of reactants and products? Specifically, consider the equilibrium reaction: N2(g) + 3H2(g) ⇌ 2NH3(g)with an initial concentration of N2 = 0.10 M, H2 = 0.20 M, and NH3 = 0.25 M. The activation energy of the reaction is 150 kJ/mol and the catalyst lowers it by 50 kJ/mol. Calculate the change in Kc for this reaction when the catalyst is added to the system.

asked Jan 30 in Chemical equilibrium by FrancineBurr (410 points)

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1 answer 49 views

What is the effect of adding a catalyst on the equilibrium position of the redox reaction: Fe3+(aq) + SCN-(aq) ⇌ FeSCN2+(aq)? Calculate the equilibrium constants (Kc and Kp) at 25°C for the reaction with and without a catalyst. Also, explain why addition of a catalyst changes the position of the equilibrium in this system.

asked Jan 30 in Chemical equilibrium by CarmellaCord (630 points)

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1 answer 56 views

If the equilibrium constant (Kc) for the reaction N2(g) + 3H2(g) ⇌ 2NH3(g) at a certain temperature is 4.0×10^-3, and a catalyst is added to speed up the reaction, how will the equilibrium position shift? Calculate the new equilibrium constant if the catalyst increases the rate of the forward reaction by a factor of 10.

asked Jan 30 in Chemical equilibrium by BarrettVep43 (450 points)

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1 answer 55 views

What is the effect of adding a catalyst on the equilibrium position of the redox reaction between potassium permanganate (KMnO4) and oxalic acid (H2C2O4)? Calculate the new equilibrium constant (Kc) and explain how the addition of the catalyst affects the forward and reverse reaction rates.

asked Jan 30 in Chemical equilibrium by AlejandraTra (550 points)

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1 answer 69 views

What is the effect of adding a catalyst on the equilibrium position of a redox reaction between hydrogen peroxide and iodide ions? Calculate the new equilibrium constant and predict the direction of the shift in equilibrium.

asked Jan 30 in Chemical equilibrium by RheaNazario (530 points)

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1 answer 70 views

What is the effect of adding a catalyst on the equilibrium position of a redox reaction between iron(III) oxide and carbon monoxide, where iron is reduced and carbon is oxidized according to the following equation?Fe2O3 + 3CO ⇆ 2Fe + 3CO2 Calculate the equilibrium constant (Kp) of the reaction at 298 K in the presence and absence of a catalyst. Explain whether or not the presence of the catalyst will affect the position of equilibrium and justify the answer with relevant calculations.

asked Jan 30 in Chemical equilibrium by RoxannaQwg41 (530 points)

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1 answer 48 views

What effect does adding a catalyst to a chemical system have on the equilibrium position and how does this impact the overall rate of reaction? Use the example of the Haber process to illustrate your answer with calculations.

asked Jan 30 in Chemical equilibrium by AlycePulley2 (330 points)

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1 answer 68 views

What is the effect of adding a catalyst on the equilibrium position of a redox reaction where iodate ions combine with sulfite ions in an acidic solution to create iodide ions and sulfate ions? Calculate the new equilibrium constant with and without the catalyst given the reaction equation: IO3^- (aq) + 3SO3^2- (aq) + H2O (l) → I^- (aq) + 3SO4^2- (aq) + 2H+ (aq) Assume the temperature, pressure and volume remain constant, and that the initial concentrations of each reactant and product are known.

asked Jan 30 in Chemical equilibrium by AnjaDacomb65 (410 points)

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