một dung dịch X có chứa các ion ; Na⁺;Ba²⁺;Ca²⁺;Mg²⁺;H⁺;Cl⁻. Muốn tách được nhiều cationra khỏi dung dịch mà không đưa thêm ion lạ vào dung dịch , ta có thể dùng dung dịch X tác dụng với những chất nào sau đây ?

Why does a red shoe appear red in daylight

Sulfur dioxide and oxygen react to form sulfur trioxide during one of the key steps in sulfuric acid synthesis. an industrial chemist studying this reaction fills a 25.0l tank with 4.5 mol of sulfur dioxide gas and 4.5 mol of oxygen gas at 30.°c. he then raises the temperature, and when the mixture has come to equilibrium measures the amount of sulfur trioxide gas to be 1.4 mol. calculate the concentration equilibrium constant for the reaction of sulfur dioxide and oxygen at the final temperature of the mixture. round your answer to 2 significant digits.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?