Chemical Forums
Chemistry Forums for Students => High School Chemistry Forum => Topic started by: tvis23089 on April 06, 2017, 08:19:31 PM
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I need help predicting the products for: __Br2+__Kl---->
I cant figure out how to use the: A+BC -----> AC+B method
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Its hard to do this sort of problem with no background at all. So usually, instructors don't give it with no background at all. You've left space for balancing, but you also need to know what reaction can happen. What's possible? What is a single replacement reaction?
Sorry to answer a question with a question, but that's what we do here. We give hints to help you solve for yourself. That's all in the Forum Rules{click} (http://www.chemicalforums.com/index.php?topic=65859.0). You agreed to these rules as a condition of signing up for our forum, and they apply to you, whether you agree with them or not, or even if you're unaware of them.
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Sorry for not giving any background, but I know what a single replacement is, I know how to balance the equation, i'm just not sure what the answer would be if I did these steps. ???
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My teacher taught me that we are supposed to predict these products by using the A + B ---> AC+B method, but I am not sure how to do it for this type of equation.
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O...kay. So. What is a single displacement reaction, and how does it apply in this case. If you can balance, then do so, if you can't, then save it for later, or don't mention it. What is possible to happen? Can you think of a random change, if there's no example of a single displacement reaction in your book?
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My teacher taught me that we are supposed to predict these products by using the A + B ---> AC+B method, but I am not sure how to do it for this type of equation.
Not the best example, but try it anyway. But you really should look for a better one.
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I am supposed to learn this type of reaction because it will be on my test tomorrow, I have tried different types of methods and I also looked in my chemistry book but I still do not know how to solve this problem. Any advice? (sorry I didn't know the rules before I came here, I just joined today)
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Do you know what a single ion displacement reaction is? If not, what do you think the name suggests?
So your teacher wants you to learn how to write this reaction as A + BC :rarrow: C + BA...what do you think A, B, and C is for this reaction?
Like Arkcon said, you need to show your working before we can give you any further help.
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This is what I got Br2+2KI--->2KBr+I2 when I solved it
The only problem is that I don't know if my teacher meant it to be a KL or KI
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This is what I got Br2+2KI--->2KBr+I2 when I solved it
The only problem is that I don't know if my teacher meant it to be a KL or KI
That looks correct - the equation is balanced and that's a single ion displacement reaction. Do you know of any element with the symbol 'L'?
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yes
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Which element would that be exactly?
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I don't think there is an element named L
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I don't think there is an element named L
That means that it must be 'I', right? Iodine has the symbol 'I'.
We know that Br2 + 2KI :rarrow: 2KBr + I2, does iodine fit this description?
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Note: chemistry is not only about finding whether the reactants given fit the scheme, it is also about knowing properties of elements and substances. Halogens are known for being able to replace their own kind according to reactivity - with F2 being the most reactive (and being able to replace all other halogens) an I2 being the least reactive (and being replaced by all other halogens). This is where the periodic table comes handy, as the reactivity gets lower when you travel down the group.