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How to Balance:

Word equation: Lead (II) and up nitrate + potassium iodide → Potassium nitrate + Lead (II) iodide

Type of Chemical Reaction: For this reaction we have a double replacement reaction.

Balancing Strategies: In this double replacement reaction the Pb and K and switch places.

To balance the equation it is helpful to think of the nitrate (NO3) as one item. This is and explained in the video.

For a complete explanation, watch:

When balancing chemical equations our goal is to have the same number of each type of atom on both sides of the equation.

Only change the coefficients (these are the numbers in front substances).
Never change the subscripts (the small numbers after elements).