Sodium borohydride, NaBH₄, a substance used in the synthesis of many pharmaceutical agents, can be prepared by reaction of NaH with B₂H₆ according to the equation 2 NaH + B2H₆ → 2 NaBH₄
(a) How many grams of NaBH₄ can be prepared by reaction between 8.55 g of NaH and 6.75 g of B₂H₆?

검증된 단계별 안내

Calculate the molar mass of NaH and B_2H_6 using the atomic masses of Na, B, and H.

Convert the given masses of NaH and B_2H_6 to moles by dividing by their respective molar masses.

Determine the limiting reactant by comparing the mole ratio of NaH to B_2H_6 from the balanced equation with the moles calculated.

Use the moles of the limiting reactant to calculate the moles of NaBH_4 produced, based on the stoichiometry of the balanced equation.

Convert the moles of NaBH_4 to grams by multiplying by its molar mass.

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주요 개념

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

Stoichiometry

Stoichiometry is the branch of chemistry that deals with the quantitative relationships between the reactants and products in a chemical reaction. It allows chemists to predict how much of each substance is consumed or produced based on balanced chemical equations. In this case, understanding the stoichiometric coefficients from the reaction equation is essential to determine the limiting reactant and calculate the mass of NaBH4 produced.

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 calculations in stoichiometry, as it dictates how much of the product can be produced from the available reactants. In this question, one must compare the moles of NaH and B2H6 to find which one limits the formation of NaBH4.

Molar Mass

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is essential for converting between the mass of a substance and the number of moles, which is necessary for stoichiometric calculations. In this problem, calculating the molar masses of NaH and B2H6 will enable the conversion of the given masses into moles, facilitating the determination of the limiting reactant and the amount of NaBH4 produced.

Sodium borohydride, NaBH4, a substance used in the synthesis of many pharmaceutical agents, can be prepared by reaction of NaH with B2H6 according to the equation 2 NaH + B2H6 → 2 NaBH4 (a) How many grams of NaBH4 can be prepared by reaction between 8.55 g of NaH and 6.75 g of B2H6?

비슷한 문제에 대한 검증된 영상 답변:

주요 개념

Stoichiometry

Limiting Reactant

Molar Mass