We’re being asked to **determine the Q **when **2.00 x 10 ^{-3 }M Ca^{2+}** and

The **reaction quotient expression** is:

$\overline{){\mathbf{Q}}{\mathbf{=}}\frac{\mathbf{products}}{\overline{)\mathbf{reactants}}}{\mathbf{=}}\mathbf{\left[}{\mathbf{Ca}}^{\mathbf{2}\mathbf{+}}\mathbf{\right]}\mathbf{\left[}{{\mathbf{SO}}_{\mathbf{4}}}^{\mathbf{2}\mathbf{-}}\mathbf{\right]}}$

Solving for **Q**:

What is the value of Q when the solution contains 2.00×10^{−3} M Ca2+ and 3.00×10^{−2}M SO_{4}^{2}^{−}?

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What scientific concept do you need to know in order to solve this problem?

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