A chemist prepares a solution of sodium chloride NaCl by measuring out 26.μmol of sodium chloride into a 100.mL volumetric flask and filling the flask to the mark with water.
Calculate the concentration in mmol/L of the chemist's sodium chloride solution. Round your answer to 2 significant digits.
Chemistry (Calculating molarity using solute moles)?
2020-08-25 12:10 am
回答 (2)
2020-08-25 12:31 am
Amount of NaCl dissolved = 26 μmol = 26 × 10⁻³ mmol
Volume of the solution = 100 mL = 100 × 10⁻³ L
Concentration = (26 × 10⁻³ mmol) / (100 × 10⁻³ L) = 0.26 mmol/L
Volume of the solution = 100 mL = 100 × 10⁻³ L
Concentration = (26 × 10⁻³ mmol) / (100 × 10⁻³ L) = 0.26 mmol/L
2020-08-25 12:33 am
26.μmol/100mL x 1000mL/L x 1mmole/1000.μmol = 0.26mmole/L
收錄日期: 2021-04-24 07:57:52
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