Question
Asked Oct 18, 2019
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What mass of lithium phosphate is needed to prepare 500. mL of a solution having a lithium ion concentration of 0.125 M?

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Expert Answer

Step 1

The number of moles for a given chemical substance are defined as a ratio of its mass to that of molar mass. The mathematical formula is as follows:

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Mass Number of moles. Molar mass

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Step 2

The concentration or the molarity for a given solution is defined as the ratio of number of moles of solute to its volume. The SI units of molarity are moles/L. It is denoted by the symbol ‘M’. The mathematical relationship is expressed as follows:

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Number of moles Molarity Volume (in L)

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Step 3

The concentration of the lithium phosphate solution is given to be 0.125 M.

The volume of the solution which is needed to be prep...

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Number of moles Molarity Volume (in L) Number of moles 0.125 mol/L= 0.5 L Number of moles=0.125 mol/L x 0.5 L -0.0625 mol

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Physical Chemistry

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