Question

При сжигании 27,4 г неизвестного металла в избытке воздуха получили оксид металла (II), который полностью растворили в избытке соляной кислоты. К образовавшемуся раствору прилили избыток раствора сульфата калия, при этом образовалось 46,6 г белого нерастворимого в воде и кислотах осадка. Hазовите неизвестный металл. Ответ подтвердите расчетами. Ответ: Барий.

Answer 1

Металл будет барий,так как он единсветный , которой с SO4 дает белый осадок, а так же  нерастворимого в воде и кислотах.Из этого следует это решение.

Answer 2

Task: Determine the unknown metal based on the given information.

To determine the unknown metal, we need to analyze the information provided in the question. Let's break down the given information step by step:

1. 27.4 g of an unknown metal was burned in excess air, resulting in the formation of an oxide of the metal (II). 2. The oxide was completely dissolved in excess hydrochloric acid. 3. An excess of potassium sulfate solution was added to the resulting solution, resulting in the formation of a white insoluble precipitate weighing 46.6 g.

Based on this information, we can use stoichiometry and the law of conservation of mass to determine the identity of the unknown metal.

Step 1: Determine the moles of the unknown metal

To determine the moles of the unknown metal, we need to calculate the moles of the oxide formed. We can use the molar mass of the oxide to convert the mass of the oxide to moles.

Let's assume the molar mass of the oxide is M g/mol.

The moles of the oxide can be calculated using the formula:

moles of oxide = mass of oxide / molar mass of oxide

Since the mass of the oxide is not given, we need to calculate it using the mass of the precipitate formed.

Step 2: Determine the moles of the precipitate

The moles of the precipitate can be calculated using the formula:

moles of precipitate = mass of precipitate / molar mass of precipitate

To determine the molar mass of the precipitate, we need to know its chemical formula. Unfortunately, the chemical formula of the precipitate is not provided in the question.

Without the chemical formula of the precipitate, it is not possible to calculate the moles of the precipitate and, consequently, the moles of the oxide and the unknown metal.

Therefore, based on the information provided, it is not possible to determine the identity of the unknown metal.

Please note that the given information is incomplete, and additional information is required to solve the problem.

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