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March 29, 2017

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When solutions of KCl and Pb(NO3)2 are mixed, a precipitate forms. Which of the following is the balanced equation for the double replacement reaction that occurs?

a. KCl(aq) + Pb(NO3)2 (aq) ¨ KNO3 (aq) + PbCl2 (s)

b. KNO3 (aq) + PbCl2 (s) ¨ KCl(aq) + Pb(NO3)2 (aq)

c. K+ (aq) + NO3-(aq) ¨ KNO3 (aq)

d. 2KCl (aq) + Pb(NO3)2 (aq) ¨ 2 KNO3 (aq) + PbCl2 (s)

e. KCl(aq) + Pb(NO3)2 (aq) ¨ KNO3 (aq) + PbCl(s)

  • Chemistry - ,

    And you think what? Just count the atoms up on both sides and find the ONLY equation which has the same number of atoms on each side.

  • Chemistry - ,

    It's that simple? Thank you. I made it harder than it was.

  • Chemistry - ,

    By the way, The answer is D. :0)

  • Chemistry - ,

    OK. For whatever it's worth, you can make an arrow this way or this way or this way.
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