Help on my chemistry lab!!?
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I am sooo confused on my chemistry lab and I need help on it. If anyone can help me figure out how to solve the 4 questions I would love you forever. Here are the questions. 1. Calculate the number of moles of calcium used in the compound. 2. Calculate the number of moles of hydroxide that combined. (hint: the gram molecular weight of hydroxide is 17g/mole). 3. Using the moles computed in problem 1 and 2, compute the experimental formula for calcium hydroxide. 4. What is the theoretical formula of calcium hydroxide?
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Answer:
You haven't given the first part of the problem, so it's practically impossible to help. However--for #3, once you have the moles of Ca and the moles of OH, use their ratio to compute the formula for calcium hydroxide. You should, in fact, find that you have one mole of Ca for every 2 moles of OH, meaning that the formula for calcium hydroxide is Ca(OH)2, which it is.
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Other answers
Without any more details, like what you did, what masses or volumes of what you measured, there is no way to help you out. If you'd like, send me a message through here with the added information, and I'll get back to you...Or, just re-post your question with more information.
You haven't given the first part of the problem, so it's practically impossible to help. However--for #3, once you have the moles of Ca and the moles of OH, use their ratio to compute the formula for calcium hydroxide. You should, in fact, find that you have one mole of Ca for every 2 moles of OH, meaning that the formula for calcium hydroxide is Ca(OH)2, which it is.
Mark S, JPAA
Without any more details, like what you did, what masses or volumes of what you measured, there is no way to help you out. If you'd like, send me a message through here with the added information, and I'll get back to you...Or, just re-post your question with more information.
hcbiochem
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