For the answer to task 23, use BLANK ANSWER SHEET No. 2. First, write the task number (23), and then write a detailed answer to it. Write the answer clearly and legibly, then transfer the completed form to BLANK ANSWER SHEET No. 2. For the experiment, you are given test tubes No. 1 and No. 2 with solutions of hydrochloric acid, magnesium sulfate, and sodium hydroxide, as well as three reagents: zinc, and solutions of sodium hydroxide and hydrochloric acid. 1) From the listed three reagents, choose two that are necessary to identify each substance in test tubes No. 1 and No. 2; 2) Write the molecular, complete ionic, and abbreviated ionic equations for the reaction that you plan to carry out to identify the substance in test tube No. 1; 3) Write the molecular, complete ionic, and abbreviated ionic equations for the reaction that you plan to carry out to identify the substance in test tube No. 2; 4) Use the table provided below to record the course of the experiment:

Question

Вопрос:

Ответ:

ФИО:Телефон:Емаил:Полное описание сути нарушения прав (почему распространение данной информации запрещено Правообладателем):

Accepted Answer

1. Выбор реактивов:

Для определения вещества в склянке №1 (предположительно раствор гидроксида натрия) и склянке №2 (предположительно раствор хлорида магния) выберем гидроксид натрия (для склянки №2) и соляную кислоту (для склянки №1).

2. Реакция для определения вещества в склянке №1 (NaOH):

Молекулярное уравнение:

\[ 2NaOH + MgCl_2 \rightarrow Mg(OH)_2\downarrow + 2NaCl \]

Полное ионное уравнение:

\[ 2Na^{+} + 2OH^{-} + Mg^{2+} + 2Cl^{-} \rightarrow Mg(OH)_2\downarrow + 2Na^{+} + 2Cl^{-} \]

Сокращённое ионное уравнение:

\[ 2OH^{-} + Mg^{2+} \rightarrow Mg(OH)_2\downarrow \]