Question

in 90 gm of 20% (w/w) aqueous solution 10 g more water is added . calculate the final concentration

Answer 1

QUESTION:-

in 90 gm of 20% (w/w) aqueous solution 10 g more water is added . calculate the final concentration

ANSWER:-

Key Concepts

 Weight/Volume Percentage Concentration is a measurement of the concentration of a soluton.

weight/volume percentage concentration is usually abbreviated as w/v (%)

To calculate w/v % concentration:

w/v (%) =    mass of solute (g)    

volume of solution (mL)× 100

Common units for w/v% concentration are g/100mL (%)

Solubilities are sometimes given in units of grams of solute per 100 mL of water, that is, as a weight/volume percentage concentration.

weight/volume is a useful concentration measure when dispensing reagents.

Note that weight/volume is also referred to as mass/volume.

mass/volume can be abbreviated as m/v

mass/volume percentage concentration is abbeviated as m/v %

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