What mass of kbr is present in 25 ml of a 0.85 m solution of potassium chloride?

Answer : The correct answer for mass of KBr = 2.53 g

Given :

Molarity of KBr solution = 0.85 M

Volume of KBr solution = 25 mL

Converting volume from mL to L ( 1 L = 1000 mL )

Volume of solution = 0.025 L

Mass of KBr = ?

Mass of KBr can be calculated using following steps :

1) To find mole of Kbr :

Mole of KBr can be calculated using molarity .

Molarity : It is defined as mole of solute present in volume of solution in Liter .

It uses unit as M or

It can be expressed as :

Plugging value of molarity and volume

Multiplying both side by 0.025 L

Mole of KBr = 0.02125

2) To find mass of Kbr :

Mass of Kbr can be calculated using mole . Mole can be expressed as :

Mole of Kbr = 0.02125 mol

Molar mass of KBr = 119.00

Plugging values in mole formula

Multiplying both side by 119.00

Mass of KBr = 2.53 g

the atomic mass is the bottom number on the element.

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