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Ch.4 - Reactions in Aqueous Solution
Brown - Chemistry: The Central Science 14th Edition
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Brown 14th EditionCh.4 - Reactions in Aqueous Solution문제 69b
4장, 문제 69b

(b) Which will contain the greater number of moles of potassium ion: 30.0 mL of 0.15 M K2CrO4 or 25.0 mL of 0.080 M K3PO4

검증된 단계별 안내
1
Calculate the moles of K_2CrO_4 in 30.0 mL of 0.15 M solution using the formula: moles = concentration (M) \(\times\) volume (L).
Determine the number of moles of potassium ions (K^+) in K_2CrO_4 by recognizing that each formula unit of K_2CrO_4 contains 2 moles of K^+.
Calculate the moles of K_3PO_4 in 25.0 mL of 0.080 M solution using the formula: moles = concentration (M) \(\times\) volume (L).
Determine the number of moles of potassium ions (K^+) in K_3PO_4 by recognizing that each formula unit of K_3PO_4 contains 3 moles of K^+.
Compare the moles of potassium ions from both solutions to determine which contains the greater number of moles of potassium ion.

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.

Molarity (M)

Molarity is a measure of concentration defined as the number of moles of solute per liter of solution. It is expressed in moles per liter (mol/L). Understanding molarity is essential for calculating the number of moles present in a given volume of solution, which is crucial for this question.
추천 영상:
가이드 코스
00:53
Molarity Concept

Stoichiometry

Stoichiometry involves the calculation of reactants and products in chemical reactions based on the balanced chemical equations. In this context, it helps determine the number of moles of potassium ions produced from the given compounds, K<sub>2</sub>CrO<sub>4</sub> and K<sub>3</sub>PO<sub>4</sub>, by analyzing their formulas and the number of potassium ions they contain.
추천 영상:
가이드 코스
01:16
Stoichiometry Concept

Conversion of Volume to Moles

To find the number of moles from a solution, one can use the formula: moles = molarity × volume (in liters). This conversion is necessary to compare the moles of potassium ions in the two solutions provided in the question, allowing for a direct comparison of their quantities.
추천 영상:
가이드 코스
02:28
Mass and Moles Conversion
관련 실천
교과서 질문

(a) Which will have the highest concentration of potassium ions: 0.20 M KCl, 0.15 M K2CrO4, or 0.080 M K3PO4?

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교과서 질문

Indicate the concentration of each ion or molecule present in the following solutions: (a) 0.35 M K3PO4 (b) 1.3×10−2 M MgSO4 (c) 0.0184 M CH3CH2OH

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교과서 질문

Indicate the concentration of each ion present in the solution formed by mixing: (a) 42.0 mL of 0.170 M NaOH with 37.6 mL of 0.400 M NaOH.

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교과서 질문

Ignoring protolysis reactions, indicate the concentration of each ion or molecule present in the following solutions: (d) a mixture of 45.0 mL of 0.272 M NaCl and 65.0 mL of 0.0247 M (NH4)2CO3. Assume that the volumes are additive.

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