Skip to main content
Ch.3 - Chemical Reactions and Reaction Stoichiometry
Brown - Chemistry: The Central Science 15th Edition
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Brown 15th EditionCh.3 - Chemical Reactions and Reaction Stoichiometry문제 75b
3장, 문제 75b

Consider the mixture of ethanol, C2H5OH, and O2 shown in the accompanying diagram. (b) Which reactant is the limiting reactant?

검증된 단계별 안내
1
Identify the balanced chemical equation for the combustion of ethanol. The equation is: C2H5OH + 3 O2 → 2 CO2 + 3 H2O.
Determine the molar ratio between ethanol and oxygen from the balanced equation. For every 1 mole of ethanol, 3 moles of oxygen are required.
Calculate the moles of each reactant present in the mixture using their given quantities and molar masses. Ethanol has a molar mass of 46.07 g/mol, and oxygen has a molar mass of 32.00 g/mol for O2.
Compare the actual mole ratio of ethanol to oxygen in the mixture to the stoichiometric mole ratio from the balanced equation.
The limiting reactant is the one that is present in less than the required stoichiometric amount compared to the other reactant. Determine which reactant runs out first based on the calculated mole ratios.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
2m

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Limiting Reactant

The limiting reactant is the substance that is completely consumed first in a chemical reaction, thus determining the maximum amount of product that can be formed. In a reaction, if one reactant is present in a lesser amount than required by the stoichiometric ratios, it limits the extent of the reaction, leading to incomplete conversion of other reactants.
추천 영상:
가이드 코스
01:30
Limiting Reagent Concept

Stoichiometry

Stoichiometry is the calculation of reactants and products in chemical reactions based on the balanced chemical equation. It involves using mole ratios derived from the coefficients of the balanced equation to determine how much of each reactant is needed or how much product can be formed, which is essential for identifying the limiting reactant.
추천 영상:
가이드 코스
01:16
Stoichiometry Concept

Molar Ratios

Molar ratios are the ratios of the amounts of reactants and products in a balanced chemical equation, expressed in moles. These ratios are crucial for determining how much of each reactant is required for a reaction and for identifying which reactant will be consumed first, thus establishing the limiting reactant in the process.
추천 영상:
가이드 코스
02:14
Neutron-Proton Ratio
관련 실천
교과서 질문

Detonation of nitroglycerin proceeds as follows: 4 C3H5N3O91l2¡ 12 CO21g2 + 6 N21g2 + O21g2 + 10 H2O1g2 (a) If a sample containing 2.00 mL of nitroglycerin 1density = 1.592 g>mL2 is detonated, how many moles of gas are produced?

1208
views
1
rank
교과서 질문

Consider the mixture of propane, C3H8, and O2 shown here. (c) How many molecules of CO2, H2O, C3H8, and O2 will be present if the reaction goes to completion?

954
views
교과서 질문

The combustion of one mole of liquid octane, CH3(CH2)6CH3, produces 5470 kJ of heat. Calculate how much heat is produced if 1.000 gallon of octane is combusted.

2565
views
교과서 질문

Consider the mixture of propane, C3H8, and O2 shown here. (a) Write a balanced equation for the combustion reaction that occurs between propane and oxygen.

626
views
교과서 질문

Consider the mixture of ethanol, C2H5OH, and O2 shown in the accompanying diagram. (c) How many molecules of CO2, H2O, C2H5OH, and O2 will be present if the reaction goes to completion?

690
views