What does a 10% (w/w) sodium hydroxide solution mean?

It means there are 10 grams of pure NaOH in every 100 grams of the finished liquid solution (10g NaOH + 90g water).

Mass Percent (% w/w)Chemistry

Mass Percent (% w/w) & Weight Concentration Calculator

Calculate weight/weight mass percent (% w/w), solute fraction, solvent percentage, and total solution mass for chemicals, reagents, and alloys.

Calculated Result

Solute Mass Percent (% w/w)

Solute Mass (grams)

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Solvent Mass (grams)

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Solute Mass Percent (% w/w)

Total Solution Mass

100 kg

Solvent Mass Percent (%)

90 %

Absolute Gravimetric Concentration: Ideal for pharmaceutical and industrial formulations requiring thermal invariance.

Mass % (w/w)

10 %(10%)

Solvent Mass Percent (%)

90 %(90%)

Standard analytical and industrial chemistry tool for gravimetric concentration profiling.

Mass Percent (% w/w) = [ Solute Mass (g) / Total Solution Mass (g) ] * 100%. Total Solution Mass = Solute Mass + Solvent Mass.

Because mass is easily and precisely measured on analytical scales and does not expand or contract when storage temperatures fluctuate.

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