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Density conversion concentration formula

Abstract: 本文讨论了密度与浓度之间的折算公式。密度是物体质量与体积的比值，而浓度则表示单位溶剂中溶质的质量或摩尔数。对于液体溶液，常用的浓度单位包括质量浓度（g/mL）和摩尔浓度（mol/L）。密度与质量浓度直接相关，摩尔浓度可以通过密度和溶质的相对分子质量进行计算。折算公式为：质量浓度C（g/mL）等于密度ρ（g/mL）；摩尔浓度C（mol/L）等于密度ρ（g/mL）除以相对分子质量M。实际操作时应注意单位转换和精度，以确保计算准确。

Density and concentration are two different physical quantities. Density refers to the ratio of the mass to volume of an object, and concentration refers to the mass or moles of solute in a unit solvent. If you want to convert between the two, you need to consider the physical and chemical properties of the solvent and solute, and choose the corresponding conversion formula according to the actual situation.

For liquid solutions, the common units of concentration are mass concentration (ie the ratio of the mass of solute to the mass of solvent) and molarity (ie the ratio of the number of moles of solute to the volume of solvent). If you know the density of a liquid solution, you can use the following formula to convert between density and concentration:

  1. Mass concentration C (g/mL) = mass m (g) / volume V (mL) = density ρ (g/mL)

  2. Molar concentration C (mol/L) = molar number n (mol) / volume V (L) = density ρ (g/mL) / relative molecular mass M

Among them, the density ρ is the density of the liquid solution, which can be obtained through experimental measurement; the relative molecular mass M is the relative molecular mass or molar mass of the solute, which can be obtained from chemical equations or related literature.

North and South Tide reminds you: the density and conversion formula of different substances may be different, and the appropriate conversion formula needs to be selected according to the actual situation. In addition, when converting between density and concentration, it is also necessary to pay attention to the conversion of units and the precision of the decimal point to avoid unnecessary errors.

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