Precipitation Reaction

[tatumpg79]

I need to write a balanced chemical equation for the reaction between:

BaCl₂(aq) and KOH(aq)

Please help! Thank You!

[GrahamKemp]

Where are you having trouble with this?

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First, determine the products. They're obviously going to be Barium hydroxide and Potassium chloride.

Next determine the precipitate. KCl is quite soluble, and a quick check determines that Baryta is not so much.

Code: Select all

_ BaCl2(aq) + _ KOH(aq) = _ Ba(OH)2(s) + _ KCl(aq)

Finally you balance them. Balance the count of Chlorine on both sides, then Hydroxide too.

Balance Cl:

Code: Select all

a BaCl2(aq) + _ KOH(aq) = _ Ba(OH)2(s) + 2a KCl(aq)

Balance OH:

Code: Select all

a BaCl2(aq) + 2b KOH(aq) = b Ba(OH)2(s) + 2a KCl(aq)

Balance Ba, K determines that a=b. For a least integer solution, a=1.
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Code: Select all

 BaCl2(aq) + 2 KOH(aq) =  Ba(OH)2(s) + 2 KCl(aq)

[tatumpg79]

Thank you for your help. I was having trouble balancing the two. I think I was making it more difficult than it really was.