Does anhydrous compound Penta-hydrate have mono- or tetra-hydrate forms?

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Discussion Overview

The discussion revolves around the classification and existence of hydrated forms of cupric sulfate, specifically addressing whether anhydrous cupric sulfate has mono- or tetra-hydrate forms. The scope includes homework-related inquiries and the clarification of chemical nomenclature.

Discussion Character

  • Homework-related
  • Debate/contested

Main Points Raised

  • Some participants emphasize the need for the original poster (OP) to show their work in order to receive help.
  • One participant states that the question refers to the monohydrate form of cupric sulfate.
  • Another participant mentions calculating the formula weights for cupric sulfate and its hydrated forms, suggesting a straightforward proportion can be formed.
  • There is a claim that the existence of mono- and tetra-hydrates is unclear, with one participant stating they are unaware of these forms.
  • A later reply asserts that mono- and tetra-hydrates do exist, but questions the status of the dihydrate form, indicating some uncertainty in the nomenclature.
  • One participant corrects themselves after misreading part of the formula, indicating the complexity of the discussion.

Areas of Agreement / Disagreement

Participants express disagreement regarding the existence of certain hydrated forms of cupric sulfate, with some asserting that mono- and tetra-hydrates exist while others are uncertain or unaware of them. The discussion remains unresolved regarding the nomenclature and classification of these compounds.

Contextual Notes

There are limitations in the clarity of the chemical nomenclature being discussed, particularly regarding the existence of dihydrate forms and the definitions of mono- and tetra-hydrates. Some participants also note the importance of showing work in homework-related inquiries.

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Homework Statement
What is the mass of CuSO4 if the mass of CuSO4.H2O is 61 grams
Relevant Equations
CuSO4.H2O
WIN_20211205_17_39_01_Pro.jpg
 
Last edited:
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Have you read the rules for the forum?
 
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Bystander said:
Have you read the rules for the forum?
There are rules?
 
You need to make an attempt at the solution, show some work.
 
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I just tried re working it and showing work but I have no idea what I'm doing and I tried using my noted but its no help
 
Where IS your work?
 
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on paper?
 
Post it here so someone can help you figure out what you're doing wrong.
 
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WIN_20211205_17_39_01_Pro.jpg
 
  • #10
In the future please show your effort when starting the thread, not an hour after. We can't comment on things we don't see.

Your logic is mostly OK, but check the molar masses you are using.
 
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  • #11
Homework Statement:What is the mass of CuSO4 if the mass of CuSO4.H2O is 61 grams

Relevant Equations:CuSO4.H2O
Calculate or find the formula weights for cupric sulfate and cupric sulfate tetra-hydrate mono-hydrate. You can find the fraction of cupric sulfate in the hydrated compound. You will be able to form a very straightforward proportion.
 
Last edited:
  • #12
The question refers to the monohydrate.
 
  • #13
symbolipoint said:
Calculate or find the formula weights for cupric sulfate and cupric sulfate tetra-hydrate. You can find the fraction of cupric sulfate in the hydrated compound.
"Penta-hydrate," I'm unaware of the existence of either mono-, or tetra-hydrates. Did not point that fact out, since it provides/exemplifies additional instructional/nomenclatural/pedagogical opportunities for the OP. The significance of small whole numbers/fractions in discussing "hydrates" is important.
 
  • #14
I MISREAD PART OF THE FORMULA. I WILL CHANGE MY RESPONSE IMMEDIATELY.
 
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  • #15
Bystander said:
"Penta-hydrate," I'm unaware of the existence of either mono-, or tetra-hydrates.
They do exist, which is why the question as posted looked OK to me. There is no tetrahydrate, it is not clear to me what is the status of dihydrate (I thought it does exist, quick googling suggest it doesn't).
 

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