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Ch.7 - Periodic Properties of the Elements

Chapter 7, Problem 64a

An element X reacts with oxygen to form XO2 and with chlorine to form XCl4. XO2 is a white solid that melts at high temperatures (above 1000 °C). Under usual conditions, XCl4 is a colorless liquid with a boiling point of 58 °C. (a) XCl4 reacts with water to form XO2 and another product. What is the likely identity of the other product?

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Hey everyone in this example we have X. O. And X. P. R. Two as products of element X. From its reaction with oxygen and bromine respectively. The reaction XpR two with water produces X. O. And an unknown. We need to identify what the unknown would be. So we're going to write the reaction out x. b. r. two reacting with water. And according to the prompt we produce X. O. And an unknown second product. So we need to determine what this unknown product is and based on our first product being given as X. O. In the product that means we have our X atom here that is bonded to the oxygen. So these two combined with one another and so all that leaves is for women to combine with our hydrogen atom here. So what we would have is H. B. R. As our product. And we need to make sure that this equation is balanced. So we're going to go ahead and place a two in front of our hbr or hydroponic acid so that everything is balanced in our equation. So based on how our products formed, we had the combination of these two atoms and then the combination of these two atoms here to form our products X. O. And H. B. R. And we want to recall that this type of reaction is a double displacement reaction or double replacement reaction. So for our final answer, we would say that the unknown product is HbR and this would be our final answer to complete this example. So I hope that everything I went through is clear. If you have any questions, please leave them down below, and I will see everyone in the next practice video.