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21 wrz 2022 · The volume ratios above can easily be used when the volume of one gas in a reaction is known, and you need to determine the volume of another gas that will either react with or be produced from the first gas. The pressure and temperature conditions of both gases need to be the same.
A balanced chemical equation shows us the numerical relationships between each of the species involved in the chemical change. We can use these numerical relationships to write mole ratios, which allow us to convert between amounts of reactants and/or products (and thus solve stoichiometry problems!).
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30 sty 2023 · Equivalent weight is the ratio of molecular mass and valence factor. It can be calculated by knowing the valence factor for acids and bases, which are the number of replaceable hydrogen and hydroxyl groups, respectively. It can also be calculated using the hydrogen-displacement method, chloride formation method and metal displacement method.
The displacement volume of drug X is 0.5mL/40mg. Step 1 – Find the final volume If the required concentration is 4mg in 1mL, then 20mL is needed for 80mg of drug X. Step 2 – Determine displacement volume If 40mg displaces 0.5mL of solution, it means 80mg displaces 1mL. Step 3 – Subtract displacement volume from final volume
3 cze 2021 · This article illustrates worked examples of calculation questions that involve the concept of displacement volumes and its implication when preparing injectable dosage forms.
21 cze 2016 · Learning objectives. By the end of this chapter you will be able to: express a liquid in either weight or volume using density values. define and use the term ‘displacement value’. Define and use the term ‘displacement volume’. calculate the amount of base required when making suppositories and pessaries. At 20°C, 1 mL of water weighs 1 g.
