How many grams of nickel (ii) chloride hexahydrate

Ответ:

lorrainelopez

02.01.2022

15.2 grams

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

$Molarity=\frac{n\times 1000}{V_s}$

where,

n= moles of solute

V_s = volume of solution in ml

moles of solute (nickel (II) chloride hexahydrate ) = $\farc{\text{given mass}}{\text {Molar mass}}=\frac{xg}{237.69g/mol}$

Putting the values , we get

$0.255= \frac{x\times 1000}{237.69\times 250}$

x=15.2g

Thus 15.2 grams of nickel (II) chloride hexahydrate are required to prepare 250. mL of aqueous solution whose concentration is 0.255 M.

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