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Prepare
0.5M in of
NaCl in a (volumetric flask)ml of water ?
M.Wt

Na=23g//mol

cl=35.5g//mole

Prepare $0.5\,\text{M}$ in of $\text{NaCl}$ in a $(\text{volumetric flask})\,\text{ml}$ of water ? $\text{M.Wt}$ $\text{Na}=23\,\text{g/mol}$ $\text{Cl}=35.5\,\text{g/mole}$

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Write linear functions: word problems

Full solution

Q. Prepare

0.5\,\text{M}

in of

\text{NaCl}

in a

(\text{volumetric flask})\,\text{ml}

of water ?

\text{M.Wt}

\text{Na}=23\,\text{g/mol}

\text{Cl}=35.5\,\text{g/mole}

Calculate Molar Mass: Calculate the molar mass of NaCl. $\newline$ NaCl = Na + Cl = $23 \, \text{g/mol} + 35.5 \, \text{g/mol} = 58.5 \, \text{g/mol}$ .
Determine Amount Needed: Determine the amount of NaCl needed for a $0.5$ M solution in $1$ liter ( $1000$ ml) of water. $\newline$ Amount of NaCl = Molarity $\times$ Molar mass $\times$ Volume (in liters) $\newline$ = $0.5$ mol/L $\times$ $58.5$ g/mol $\times$ $1$ L $\newline$ = $1$ $0$ g.
Assume Solution Volume: Since the problem does not specify the volume of the solution, assume it is $1$ liter for calculation purposes.

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