(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

What molar concentration of each ion appear in 0.16M Pb(NO_{3})_{2}?

*Note* The title incorrectly says "moles".

2. Relevant equations

M = mol/L

3. The attempt at a solution

My teacher tells me this is wrong, but I can't see my fault:

Molar Mass of Pb^{+2}= 207.20g

Molar Mass of NO_{3}^{-}= 124.02g

[itex]\frac{x}{1L} = 0.16M[/itex]

[itex]x = 0.16mol[/itex]

[itex]0.16mol = \frac{y*1mol}{331.22g}[/itex]

[itex]y = 53g[/itex]

[itex]Pb: 53g * \frac{207.20g}{331.22g} = 33g[/itex]

[itex]\frac{33g}{331.22g} = 0.10mol[/itex]

[itex]NO_{3}: 53g *\frac{124.02}{331.22g} = 20g[/itex]

[itex]\frac{20g}{331.22g} = 0.06mol[/itex]

[itex]Pb = \frac{0.10mol}{1L} = 0.10M[/itex]

[itex]NO_{3} = \frac{0.06mol}{1L} = 0.06M[/itex]

Any ideas where I messed up?

Or if I did?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: How many moles of XYZ

**Physics Forums | Science Articles, Homework Help, Discussion**