Английский язык: english for masters of chemistry
Tasks 1. Match the terms with the definitions
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- 2. Translate the sentences into English without using a dictionary.
| Tasks
1. Match the terms with the definitions. 1. analyte a. a homogeneous mixture composed of two or more substances 2. titrant b. a substance that is dissolved in another substance, known as solvent. These two are present in a solution 3. endpoint c. a solution of the substance whose concentration is unknown and sought in the analysis 4. indicator d. solution in which the concentration of a solute is precisely known 5. solution e. the point at which the titration is complete, as determined by an indicator 6. solute f. a substance used to show the presence of a chemical substance by its color 2. Translate the sentences into English without using a dictionary. 1. Стандартный раствор — это раствор известной концентрации. 2. Во время титрования титрант прибавляют к раствору неизвестной концентрации для достижения точки эквивалентности. 3. Выбор индикатора может стать ключом к успешному титрованию. 4. В широком смысле титрование — это определение концентрации вещества в растворе. 5. Кислотно-основное титрование основано на реакции нейтрализации. 3. Read the following text about acid-base titration and unscramble the letters in the brackets to find the correct word. Acid-base titrations are usually used to find the a________ 1 (tamnuo) of a known acidic or basic substance through acid-base reactions. The a________ 2 (lanatey) is the solution with an unknown m________ 3 (larmotiy). The titrant is the solution with a known molarity that will react with the analyte. The analyte is prepared by dissolving the substance being studied into a s________ 4 (nosotiul). The solution is usually placed in a f________ 5 (skalf) for titration. A small amount of i________ 6 (candiroti) is then added into the flask along with the analyte. The reagent is usually placed in a b________ 7 (terubet) and slowly added to the analyte and indicator mixture. The amount of reagent used is recorded when the indicator causes a change in the color of the solution. 34 |