Recent questions in Chemical reactions

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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 Dominic1066 (370 points)

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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 BartLundie14 (570 points)

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A student carried out a chemical reaction in the laboratory and obtained 12 grams of the product. However, the theoretical yield of the product was 15 grams. Calculate the percent yield of the product.

asked Jan 22 in Chemical reactions by EmeryJobe37 (430 points)

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A student attempted to synthesize 20 grams of a compound, but only ended up with 15 grams of the compound after the reaction. Calculate the percentage yield of the reaction.

asked Jan 22 in Chemical reactions by Sandra59H781 (450 points)

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A student attempted to produce 25 grams of product by performing a chemical reaction, but only obtained 18 grams. What was the percent yield for this reaction?

asked Jan 22 in Chemical reactions by Jimmie94W08 (410 points)

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1 answer 7 views

A question for the student to solve could be: If a certain equilibrium reaction is exothermic, and the concentration of reactant A is increased while the concentration of product B is decreased, predict the change in the equilibrium constant value (K) and explain your reasoning by applying Le Chatelier's principle.

asked Jan 22 in Chemical reactions by BryceParry7 (370 points)

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A laboratory made a buffer solution by mixing 25 mL of 0.10 M acetic acid (Ka = 1.8 x 10^-5) with 15 mL of 0.20 M sodium acetate solution. Calculate the pH of the buffer solution assuming both the acid and the acetate ions are completely dissociated.

asked Jan 22 in Chemical reactions by HSMEvie9955 (470 points)

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1 answer 46 views

A laboratory assistant is asked to prepare a buffer solution with a pH of 7.10 using acetic acid (CH3COOH) and sodium acetate (NaCH3COO). If the laboratory assistant has 250 mL of 0.20 M acetic acid, how many grams of NaCH3COO will be needed to make the buffer solution?

asked Jan 22 in Chemical reactions by RosaThrash79 (530 points)

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A container has a mixture of nitrogen and oxygen gases at equilibrium. If the temperature of the container is increased, predict the direction in which the equilibrium will shift according to Le Chatelier's principle and explain why.

asked Jan 22 in Chemical reactions by VirgieMcLaur (650 points)

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1 answer 51 views

A chemistry student wants to synthesize alum (KAl(SO4)2.12H2O) from 12 g of potassium hydroxide (KOH) and excess sulfuric acid (H2SO4). If the actual yield of the reaction is 9.3 g, what is the percent yield of this reaction?

asked Jan 22 in Chemical reactions by Larhonda9708 (410 points)

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A chemistry student wants to perform a reaction that produces carbon dioxide gas. If the student has 500 grams of calcium carbonate and an excess of hydrochloric acid, how many liters of carbon dioxide gas can be produced at Standard Temperature and Pressure (STP)? (Assume the reaction goes to completion)

asked Jan 22 in Chemical reactions by LacyBastyan (550 points)

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A chemistry student wants to measure the rate of a chemical reaction. The reaction involves the reaction between zinc and hydrochloric acid. The student weighed out 0.5 grams of zinc and mixed it with 50 mL of 0.5 M hydrochloric acid. The student measured the time it took for the reaction to complete and found it took 3 minutes to produce all the hydrogen gas. Calculate the rate of the reaction in grams of zinc per minute.

asked Jan 22 in Chemical reactions by RaymonLamar7 (770 points)

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A chemistry student wants to know the equilibrium constant for the reaction between nitrogen and hydrogen to produce ammonia. If the initial concentration of nitrogen is 0.2 moles/L, the initial concentration of hydrogen is 0.1 moles/L, and the equilibrium concentration of ammonia is 0.3 moles/L, what is the equilibrium constant for this reaction?

asked Jan 22 in Chemical reactions by ToddPamphlet (590 points)

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1 answer 47 views

A chemistry student wants to know how the equilibrium of a reaction will be affected by an increase in temperature. The reaction studied is N2(g) + 3H2(g) ↔ 2NH3(g) and has an equilibrium constant (Kc) of 3.5 x 10^-5 at a certain temperature. If the temperature is increased, what will happen to the concentration of NH3 at equilibrium?

asked Jan 22 in Chemical reactions by JaredHerzog0 (270 points)

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A chemistry student wants to investigate the activation energy for a reaction between hydrogen and chlorine gases. The student measures the initial and final temperatures of the reaction mixture, and the rate of gas evolution. Based on this information, the student wants to calculate the activation energy of the reaction using the Arrhenius equation. What steps should the student follow to determine the activation energy of the reaction?

asked Jan 22 in Chemical reactions by ThaoCrews506 (210 points)

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A chemistry student wants to find the concentration of a hydrochloric acid (HCl) solution. To do this, the student performs a titration experiment with a sodium hydroxide (NaOH) solution of known concentration. The student adds 25 mL of the HCl solution to a flask with an indicator, and then slowly adds the NaOH solution until the indicator changes color. It was found that it took 18.2 mL of the 0.1 M NaOH solution to reach the endpoint. What is the concentration of the HCl solution?

asked Jan 22 in Chemical reactions by ChadwickIeve (270 points)

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1 answer 46 views

A chemistry student wants to determine the reaction rate of a chemical reaction. They mix 8 grams of reactant A with 12 grams of reactant B in a beaker at room temperature. After 10 seconds, they observe that the mass of the beaker's contents has decreased by 2 grams. What is the reaction rate of the chemical reaction?

asked Jan 22 in Chemical reactions by IEVKatlyn165 (550 points)

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1 answer 63 views

A chemistry student wants to create a chemical reaction that produces exactly 25 grams of water. How many grams of hydrogen and oxygen would need to react to create this amount of water?

asked Jan 22 in Chemical reactions by SDHMillard5 (430 points)

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1 answer 45 views

A chemistry student synthesized 25 grams of aspirin theoretically, but only obtained 20 grams practically in the lab. Calculate the percent yield of aspirin.

asked Jan 22 in Chemical reactions by LawannaPraed (450 points)

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A chemistry student performed a reaction that produced 2.0 grams of product. The theoretical yield for this reaction is 2.5 grams. Calculate the percent yield for this reaction.

asked Jan 22 in Chemical reactions by Douglas62730 (610 points)

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