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OAE Chemistry (009) Practice Tests & Test Prep by Exam Edge - Free Test


Our free OAE Chemistry (009) Practice Test was created by experienced educators who designed them to align with the official Ohio Assessments for Educators content guidelines. They were built to accurately mirror the real exam's structure, coverage of topics, difficulty, and types of questions.

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OAE Chemistry - Free Test Sample Questions

The gradual addition of a solution of accurately known concentration to another solution of unknown concentration until the chemical reaction between the two solutions is complete is known as which of the following?

Correct Answer:
titration
the gradual addition of a solution of accurately known concentration to another solution of unknown concentration until the chemical reaction between the two solutions is complete is known as titration.

titration is a fundamental analytical chemistry technique used extensively in various industries and academic fields to determine the concentration of an unknown solution. it involves the precise measurement of the volume of a titrant (a solution of known concentration) required to react completely with a given volume of a titrand or analyte (the solution whose concentration is unknown).

the process involves using a piece of equipment called a burette, which is essentially a graduated glass tube with a control valve (stopcock). the titrant is added gradually to the analyte solution while continuously mixing until the reaction reaches a completion point known as the endpoint. this endpoint is usually indicated by a color change of an indicator substance added to the analyte or by achieving a desired ph level which is monitored using a ph meter.

the principle behind titration is based on a stoichiometric reaction between the titrant and analyte, allowing for the quantitative determination of the analyte concentration. the reaction can be an acid-base neutralization, a precipitation reaction, or a redox reaction, each requiring specific types of titrants and indicators.

the precise volume of titrant dispensed from the burette at the endpoint allows the calculation of the concentration of the unknown solution using the stoichiometry of the titration reaction. this calculation involves using the known concentration of the titrant, the volume of titrant used, and the volume of the analyte to determine the concentration of the unknown solution.

titration is not only crucial for academic research but also for the manufacturing of chemicals, pharmaceuticals, food and beverage production, and water quality testing, making it an indispensable method in many scientific and industrial applications.