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Ch.4 - Chemical Reactions and Chemical Quantities
Tro - Chemistry: A Molecular Approach 6th Edition
Tro6th EditionChemistry: A Molecular ApproachISBN: 9780137832217당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Tro 6th EditionCh.4 - Chemical Reactions and Chemical Quantities문제 58c
4장, 문제 58c

Many computer chips are manufactured from silicon, which occurs in nature as SiO2. When SiO2 is heated to melting, it reacts with solid carbon to form liquid silicon and carbon monoxide gas. In an industrial preparation of silicon, 177.4 kg of SiO2 reacts with 100.1 kg of carbon to produce 71.2 kg of silicon. Determine the percent yield for the reaction.

검증된 단계별 안내
1
Write the balanced chemical equation for the reaction: SiO_2 (s) + 2C (s) -> Si (l) + 2CO (g).
Calculate the molar masses of SiO_2, C, and Si using the periodic table.
Convert the given masses of SiO_2 and C to moles using their respective molar masses.
Determine the theoretical yield of silicon by using stoichiometry based on the limiting reactant.
Calculate the percent yield using the formula: (actual yield / theoretical yield) * 100%.

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.

Stoichiometry

Stoichiometry is the calculation of reactants and products in chemical reactions based on the balanced chemical equation. It allows chemists to determine the proportions of substances involved in a reaction, which is essential for predicting how much product can be formed from given amounts of reactants.
추천 영상:
가이드 코스
01:16
Stoichiometry Concept

Percent Yield

Percent yield is a measure of the efficiency of a chemical reaction, calculated by comparing the actual yield of a product to the theoretical yield. It is expressed as a percentage and provides insight into how much of the expected product was actually obtained, helping to assess the effectiveness of the reaction conditions.
추천 영상:
가이드 코스
03:09
Percent Yield in Reactions

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. Identifying the limiting reactant is crucial for accurate stoichiometric calculations and for determining the theoretical yield of the reaction.
추천 영상:
가이드 코스
01:30
Limiting Reagent Concept
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교과서 질문

Elemental phosphorus reacts with chlorine gas according to the equation: P4(s) + 6 Cl2( g) → 4 PCl3(l) A reaction mixture initially contains 91.38 g P4 and 262.6 g Cl2. Once the reaction has occurred as completely as possible, what mass (in g) of the excess reactant remains?

교과서 질문

Magnesium oxide can be made by heating magnesium metal in the presence of oxygen. The balanced equation for the reaction is: 2 Mg(s) + O2(g) → 2 MgO(s) When 13.1 g of Mg reacts with 13.6 g O2, 12.4 g MgO is collected. Determine the limiting reactant, theoretical yield, and percent yield for the reaction.

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Urea (CH4N2O) is a common fertilizer that is synthesized by the reaction of ammonia (NH3) with carbon dioxide: 2 NH3(aq) + CO2(aq) → CH4N2O(aq) + H2O(l) In an industrial synthesis of urea, a chemist combines 149.4 kg of ammonia with 231.1 kg of carbon dioxide and obtains 172.3 kg of urea. Determine the limiting reactant, theoretical yield of urea, and percent yield for the reaction.