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2 năm trước
` SO_3 + NaOH \to NaHSO_4` ` SO_3 + 2NaOH \to Na_2SO_4 + H_2O` Mình muốn hỏi là hai phương trình này nó xảy ra đồng thời cùng 1 lúc hay là tùy vào điều kiện mà nó xảy ra PT 1 hoặc PT 2 , nếu đúng như thế thì điều kiện là gì?
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