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Student Question

Secondary IV • 2yr.

Good morning! 

I have a science lab this week and I don't understand why in the protocol it says to weigh the weighing scoop first by itself and after the weighing scoop plus the solution.

Can someone explain to me please?


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Explanations (1)

  • Explanation from Alloprof

    Explanation from Alloprof

    This Explanation was submitted by a member of the Alloprof team.

    Team Alloprof • 2yr.

    Good morning!

    Thank you for asking us your question 🙂

    In your experience, it is the mass of your solute only that you are trying to find out. However, it is always best not to put certain solutions directly on the tool you are using to weigh, as some substances could be corrosive.

    To avoid damaging the scale, a weighing scoop, a small container, is used to deposit the solute. To isolate the mass of the solute, it suffices to subtract the mass of the weighing scoop from the total mass of the weighing scoop and the solution. This is why it is important to weigh the weighing scoop alone initially!

    Hope that answers your question! Do not hesitate to come back to see us if you have any other questions!

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