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# Molality and Percent

### cava s2d22 303 2.06 Molality and Percent by mass or volume

Question | Answer |
---|---|

A percentage is a part out of the whole, where the whole is [...]. | A percentage is a part out of the whole, where the whole is 100. |

Percent solutions are often called volume/[...] calculations. | Percent solutions are often called volume/volume calculations. |

It's easy to calculate the volume/volume percent of a [...]/[...] solution because it's easy to measure the volume of [-s]. | It's easy to calculate the volume/volume percent of a liquid/liquid solution because it's easy to measure the volume of liquids. |

The concentration of a solution can also be given in terms of a mass/[...] percentage. | The concentration of a solution can also be given in terms of a mass/mass percentage. |

[Mola-] with the symbol m (lower-case!), is a measure of the number of moles of a solute in 1 kilogram of solvent. | MolaLITY with the symbol m, is a measure of the number of moles of a solute in 1 kilogram of solvent. |

Remember that moLARity is per [...] because molaR and [...] both end in R. | Remember that moLARity is per LITER because molaR and liteR both end in R. |

Remember that moLaLity is not per [...] because molaL and [...] don't end in the same letter. | Remember that moLaLity is not per LITER because molaL and liteR don't end in the same letter. |

Molarity and molality are ratios: They compare moles of solute to some measure of [...]. | Molarity and molality are ratios: They compare moles of solute to some measure of solvent. |

All percentages (mass/mass, volume/volume) are [...]: they compare a part to the whole. | All percentages (mass/mass, volume/volume) are fractions: they compare a part to the whole. |

[Mola--ity] is rarely used, but [mola--ity] is very common. | MoLALity is rarely used, but MoLARity is very common. |

A percentage is a part out of the [...], where the [...] is 100. | A percentage is a part out of the whole, where the whole is 100. |

MolaLITY with the symbol m, is a measure of the number of moles of a solute in 1 [...] of solvent. | MolaLITY with the symbol m, is a measure of the number of moles of a solute in 1 kilogram of solvent. |

MolaLITY with the symbol m, is a measure of the number of moles of a solute in 1 kilogram of [...]. | MolaLITY with the symbol m, is a measure of the number of moles of a solute in 1 kilogram of solvent. |

All percentages (mass/mass, volume/volume) are fractions: they compare a [...] to the [...]. | All percentages (mass/mass, volume/volume) are fractions: they compare a part to the whole. |

Created by:
mr.shapard