Recent questions in Chemical reactions

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A student wants to find the equilibrium constant for the following reaction at a temperature of 298 K:2NO(g) + Cl2(g) ⇌ 2NOCl(g)The student measures the equilibrium concentrations to be [NO] = 0.050 M, [Cl2] = 0.025 M, and [NOCl] = 0.080 M. What is the equilibrium constant (Kc) for the reaction at this temperature?

asked Jan 22 in Chemical reactions by VetaPetterd1 (1.7k points)

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1 answer 85 views

A student wants to find the enthalpy change of a chemical reaction using Hess's Law, but the only information provided is the enthalpy change of two other reactions. Design an experiment to determine the enthalpy change of the unknown reaction using the given data and Hess's Law.

asked Jan 22 in Chemical reactions by IWHJaxon1452 (2.1k points)

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1 answer 108 views

A student reacted 10.0 grams of NaOH with 12.0 grams of HCl to produce NaCl and H2O. The balanced chemical equation for the reaction is as follows:NaOH + HCl → NaCl + H2OIf the expected yield of NaCl is 9.0 grams, what is the percent yield of the reaction?

asked Jan 22 in Chemical reactions by KaraTva8370 (2.3k points)

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1 answer 79 views

A student performs a chemical reaction in which the theoretical yield of a particular product is 25 grams. After carrying out the reaction, the student recovers only 18 grams of the product. What is the percent yield of the reaction?

asked Jan 22 in Chemical reactions by Melanie86K41 (1.7k points)

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1 answer 120 views

A student performs a chemical reaction between 12.5 grams of magnesium and 15.0 grams of hydrochloric acid to produce magnesium chloride and hydrogen gas. If the theoretical yield of magnesium chloride is 25.7 grams, calculate the percent yield of the reaction.

asked Jan 22 in Chemical reactions by Cameron54A25 (1.9k points)

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1 answer 138 views

A student performed an experiment to synthesize aspirin using 5 grams of salicylic acid and an excess of acetic anhydride. After the reaction was completed, the student collected 4.2 grams of aspirin. What is the percent yield of this experiment?

asked Jan 22 in Chemical reactions by SteveAdamson (1.7k points)

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1 answer 131 views

A student performed an experiment in which 2.1 moles of nitrogen and 0.8 moles of hydrogen react to form ammonia gas. If the equilibrium constant for the reaction is 3.5 x 10^-4 at a certain temperature, what is the equilibrium concentration of ammonia?

asked Jan 22 in Chemical reactions by SherrylIwz83 (2.0k points)

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1 answer 206 views

A student needs to prepare a buffer solution with a pH of 7.20 using acetic acid (CH3COOH) and sodium acetate (NaCH3COO), with a total buffer concentration of 0.20 M. What mass of CH3COOH needs to be added to 200 mL of 0.10 M NaCH3COO to obtain the desired pH? (Ka of CH3COOH is 1.8x10^-5)

asked Jan 22 in Chemical reactions by TomokoSorian (2.2k points)

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1 answer 154 views

A student needs to prepare a buffer solution with a pH of 4.5 using acetic acid (pKa = 4.76) and its conjugate base sodium acetate. The student has 100 mL of 0.1 M acetic acid and has access to sodium acetate. What mass of sodium acetate (in grams) should the student add to the solution to achieve the desired pH?

asked Jan 22 in Chemical reactions by Maura45O7086 (2.5k points)

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1 answer 118 views

A student needs to prepare 500 mL of a buffer solution with a pH of 7.5 using a weak acid HA and its conjugate base A-. HA has a pKa of 4.5 and its initial concentration is 0.2 M. What mass of HA and A- should be mixed to prepare the buffer solution?

asked Jan 22 in Chemical reactions by DeenaTrundle (2.2k points)

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1 answer 142 views

A student needs to determine the enthalpy change of a chemical reaction using the Hess's Law equation. They have the following information:- The enthalpy change for Reaction 1 is -210 kJ/mol- The enthalpy change for Reaction 2 is -325 kJ/mol- The enthalpy change for Reaction 3 is 155 kJ/molThe student needs to use Hess's Law to calculate the enthalpy change for the following reaction:4A + 3B → 2CGiven the information above, what is the enthalpy change for the reaction?

asked Jan 22 in Chemical reactions by LamontMccror (1.9k points)

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1 answer 116 views

A student needs to determine the concentration of a sulfuric acid solution using a sodium hydroxide solution of known concentration. The student performs a titration and records that it took 27.5 milliliters of the sodium hydroxide solution to neutralize 25 milliliters of the sulfuric acid solution. What is the concentration (in moles per liter) of the sulfuric acid solution?

asked Jan 22 in Chemical reactions by DorieEverson (2.0k points)

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1 answer 162 views

A student needs to calculate the enthalpy change for a chemical reaction given the enthalpies of formation of the reactants and products. The specific problem is: Calculate the enthalpy change for the reaction:CH4(g) + 2O2(g) → CO2(g) + 2H2O(l)Given the following enthalpies of formation:ΔHf(CH4) = -74.8 kJ/molΔHf(CO2) = -393.5 kJ/molΔHf(H2O) = -285.8 kJ/mol

asked Jan 22 in Chemical reactions by ChristenaGra (1.6k points)

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1 answer 132 views

A student mixed 25.0 grams of sodium hydroxide with excess hydrochloric acid. If the theoretical yield of sodium chloride is 34.0 grams, what is the percent yield of the reaction?

asked Jan 22 in Chemical reactions by JonasQuj2910 (2.1k points)

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1 answer 120 views

A student mixed 10 grams of iron and 15 grams of oxygen to produce iron oxide. What is the limiting reactant and what is the mass of the iron oxide produced? (Assume all reactions are complete)

asked Jan 22 in Chemical reactions by BradCoz53277 (1.9k points)

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1 answer 154 views

A student is trying to synthesize a compound in the lab. The theoretical yield of the compound is 15 g, but due to some errors during the experiment, the student was only able to obtain 10 g in the end. Calculate the percent yield of the experiment.

asked Jan 22 in Chemical reactions by RachelMcCann (2.2k points)

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1 answer 91 views

A student has 5 grams of sulfur and 8 grams of oxygen. When the two are reacted to form sulfur dioxide, which one is the limiting reactant, and how much sulfur dioxide can be produced?

asked Jan 22 in Chemical reactions by ChasityLearm (2.1k points)

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1 answer 171 views

A student has 20 grams of iron and 40 grams of oxygen. What is the limiting reactant in the reaction between iron and oxygen to form iron oxide (FeO)? How many grams of FeO can be produced assuming complete reaction and no excess reactants?

asked Jan 22 in Chemical reactions by CandelariaFe (1.6k points)

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1 answer 130 views

A student formed 25 grams of carbon dioxide through a chemical reaction. If the theoretical yield of carbon dioxide is 30 grams, what is the percent yield of the reaction?

asked Jan 22 in Chemical reactions by KyleSchlemme (2.1k points)

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1 answer 176 views

A student conducted an experiment to produce copper sulfate using a known amount of copper oxide and sulfuric acid. The expected yield was 30 grams of copper sulfate, but the student obtained only 25 grams. What is the percent yield of the reaction?

asked Jan 22 in Chemical reactions by JaninaDohert (2.2k points)

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