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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 88c
4장, 문제 88c

A solution is made by mixing 1.5 g of Sr(OH)2 and 23.5 mL of 1.000 M HNO3. (c) Is the resulting solution acidic or basic?

검증된 단계별 안내
1
Calculate the number of moles of Sr(OH)2 by using its molar mass. The molar mass of Sr(OH)2 is calculated as follows: Sr = 87.62 g/mol, O = 16.00 g/mol, H = 1.01 g/mol. Thus, the molar mass of Sr(OH)2 = 87.62 + (16.00*2) + (1.01*2) = 121.64 g/mol. Use the formula: moles = mass / molar mass.
Calculate the number of moles of HNO3 using the concentration and volume. Convert the volume from mL to L by dividing by 1000. Then use the formula: moles = concentration (M) * volume (L).
Compare the moles of Sr(OH)2 and HNO3 to determine the limiting reactant. The reaction between Sr(OH)2 and HNO3 is a neutralization reaction, where Sr(OH)2 reacts with 2 moles of HNO3 for every mole of Sr(OH)2.
Determine if there is any excess reactant. If there are more moles of Sr(OH)2 than required to completely react with the available moles of HNO3, Sr(OH)2 is in excess and the solution will be basic. Conversely, if there are more moles of HNO3 than required to react with Sr(OH)2, HNO3 is in excess and the solution will be acidic.
Conclude whether the solution is acidic or basic based on which reactant is in excess.

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이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
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3m

주요 개념

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

Acid-Base Reactions

Acid-base reactions involve the transfer of protons (H+) between reactants. In this case, Sr(OH)2 is a strong base that dissociates in solution to produce hydroxide ions (OH-), while HNO3 is a strong acid that dissociates to produce hydrogen ions (H+). The resulting pH of the solution will depend on the relative amounts of acid and base present.
추천 영상:
가이드 코스
01:09
Acid-Base Reaction

Stoichiometry

Stoichiometry is the calculation of reactants and products in chemical reactions. To determine whether the solution is acidic or basic, one must calculate the moles of Sr(OH)2 and HNO3. This involves converting grams of Sr(OH)2 to moles and using the molarity of HNO3 to find its moles, allowing for a comparison of the acid and base present in the solution.
추천 영상:
가이드 코스
01:16
Stoichiometry Concept

pH Scale

The pH scale measures the acidity or basicity of a solution, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral. A solution is considered acidic if its pH is less than 7 and basic if its pH is greater than 7. After determining the moles of acid and base, the resulting pH can be calculated to classify the solution accordingly.
추천 영상:
가이드 코스
02:33
The pH Scale
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