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Finding the formula of hydrated copper(II) sulfate | Class experiment | RSC Education

July 14, 2025 - In this experiment, a known mass of hydrated copper(II) sulfate is heated to remove the water of crystallisation · This is a class experiment suitable for students who already have a reasonable understanding of the mole concept. The mass of water is found by weighing before and after heating. This information is used to find x in the formula CuSO4.xH2O, using mole calculations

Copper

chemical compound

Copper(II)-sulfate-pentahydrate-xtal-1985-Cu-coord-3D-bs-17.png

Copper(II)-sulfate-pentahydrate-unit-cell-1985-3D-bs-17.png

Copper(II) sulfate is an inorganic compound with the chemical formula · CuSO4. It forms hydrates · CuSO4·nH2O, where n can range from 1 to 7. The pentahydrate (n = 5), a bright … Wikipedia

Factsheet

Names IUPAC name
Copper(II) sulfate

CAS Number 7758-98-7 (anhydrous) Y
7758-99-8 (pentahydrate) Y
16448-28-5 (trihydrate) N
19086-18-1 (heptahydrate) N

Factsheet

Names IUPAC name
Copper(II) sulfate

CAS Number 7758-98-7 (anhydrous) Y
7758-99-8 (pentahydrate) Y
16448-28-5 (trihydrate) N
19086-18-1 (heptahydrate) N

en.wikipedia.org › wiki › Copper(II)_sulfate

Copper(II) sulfate - Wikipedia

December 6, 2025 - Copper(II) sulfate is an inorganic compound with the chemical formula · CuSO4. It forms hydrates · CuSO4·nH2O, where n can range from 1 to 7. The pentahydrate (n = 5), a bright blue crystal, is the most commonly encountered hydrate of copper(II) sulfate, while its anhydrous form is white.

Preparation and occurrence

Chemical properties

Other forms of copper sulfate

Toxicological effects

Videos

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Equation for CuSO4 + H2O | Copper (II) sulfate + Water - YouTube

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How to Write the Formula for Copper (II) sulfate pentahydrate - ...

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Finding the formula of hydrated Copper Sulfate - using an unbreakable ...

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Hydrated to Anhydrous Copper Sulfate, a Reversible Reaction. - YouTube

reddit.com › r/chemhelp › determining the formula of a copper (ii) sulfate hydrate.

r/chemhelp on Reddit: Determining the formula of a Copper (ii) Sulfate Hydrate.

April 19, 2013 -

Hello r/chemhelp. Hopefully this is not a foolish question but I did a lab in my grade 11 Chemistry class. I am unfortunately weak in chemistry and should not of taken it (my grade 12 courses and university plans don't relate to chem). With that being said I still find chemistry interesting but it is not something I excel at and it is depressing because I would like too. Anyways, I am assuming this is incorrect but I do not understand how this could of happened.

The purpose of this experiment is to find the formula of CuSO4 * xH2O.

We placed 2 grams of a hydrated sample into a crucible and held it over a Bunsen burner on low heat until it turned into the white anhydrous form. We weighed the empty crucible, the hydrated forum, and the anhydrous forum. I did not add anything else. I am trying to do the analysis questions but my mass doesn't make sense. This experiment was done yesterday and I am ashamed to ask my teacher to get all the supplies out and do it again.

Empty crucible: 25.07g Hydrated Copper (ii) Sulfate: 26.11g Anhydrous CuSO4: 26.40g

Ok, well if we subtract the weight of the empty crucible, you started with 1.04 grams of hydrated copper sulphate. And somehow you ended up with 1.33 grams of "anhydrous" copper sulphate? Sorry, but that's impossible. If you are absolutely sure that nothing else was somehow dropped into the crucible, then I suspect a weighing error must have occurred. Perhaps the balance wasn't reading zero (it wasn't tared) when you weighed the crucible with the hydrated copper sulphate in it. Then, once the experiment was complete, if you reweighed it with the balance actually at zero (properly tared) then you could have easily read off a weight which was more than you thought you started with. In any case, the actual formula of hydrated copper sulphate is CuSO4.5H20. The molar mass of this is 249.5, whereas the molar mass of anhydrous copper sulphate is 159.5. The difference between them is 90. This translates to 36.1% water by weight. So your 1.04 grams of hydrated copper sulphate, if completely converted to the anhydrous form, should be reduced in mass by 36.1%, making it now weigh 0.665 grams. That answer is precisely half the weight you actually ended up with (0.665 x 2 = 1.33). This may be a coincidence, but it may also be that somewhere in your calculations, you somehow ended up multiplying your answer by 2? Not sure how, but it would explain the result.

As midnight-cheeseater said, there seems to either be a small calculation error, otherwise the result obtained is simply impossible. If I was to give a small piece of advice, try doing the analysis again since it's good practice. If you do end up doing it again, make sure to use the same exact scale when weighing everything from when you start to when you finish. Calibration differences between scales can throw off your analysis. Also make sure to handle everything with clean gloves. Using bare hands can transfer oils or dirty gloves can transfer bits of powder to your sample.

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copper(II) sulfate hexahydrate (CHEBI:91246)

A hydrate that is the hexahydrate form of copper(2+) sulfate.

UT Austin Chemistry

ch301.cm.utexas.edu › help › general › compstoich.pdf pdf

Compound Stoichiometry - Mole Concept

laboratory balance as shown below. The chemical formula for copper(II) sulfate is CuSO4·5H2O. Note that the “·5” · in front of the H2O means that 5 waters of hydration are part of the formula.

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Hydrated Copper Sulfate Formula | UKEssays.com

July 21, 2025 - The value x = 5.0755 can be approximate to x = 5; therefore, the empirical formula is CuSO4· 5H2O. As stated by theory, when heating the crystals, the water will evaporate depending on the temperature.

sigmaaldrich.com › US › en › product › sigald › 209201

Copper(II) sulfate 98 23254-43-5

Copper(II) sulfate hydrate 98%; CAS Number: 23254-43-5; EC Number: 231-847-6; Linear Formula: CuSO4 · xH2O at Sigma-Aldrich

pubchem.ncbi.nlm.nih.gov › compound › Copper-sulfate-pentahydrate

Copper sulfate pentahydrate | CuSO4.5H2O | CID 24463 - PubChem

Copper sulfate pentahydrate | CuSO4.5H2O or CuH10O9S | CID 24463 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.

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sample of hydrated copper(II) sulfate - Chemistry - Vaia

In the case of hydrated copper(II) sulfate, once we determine the hydration number 'x' using stoichiometry, we can accurately write its molecular formula as \textbf{CuSO\(_4\)・xH\(_2\)O}. Furthermore, knowing the molecular formula is crucial ...

sigmaaldrich.com › substance › copper(ii) sulfate hydrate

Copper(II) sulfate hydrate -

Copper(II) sulfate hydrate. CuSO4 · xH2O. CAS 23254-43-5. Molecular Weight 159.61 (anhydrous basis). Browse Copper(II) sulfate hydrate and related products at MilliporeSigma.

brainly.com › chemistry › college › 4. a mass of 2.50 grams of blue, hydrated copper(ii) sulfate is placed in a container and heated to remove all of the water. after heating, 1.59 grams of white, anhydrous copper(ii) sulfate remains. what is the formula and name of the original hydrate?

[FREE] 4. A mass of 2.50 grams of blue, hydrated copper(II) sulfate is placed in a container and heated to remove - brainly.com

The original hydrate is copper(II) sulfate pentahydrate, with the formula CuSO₄·5H₂O. This was found by calculating the mass of water lost during heating and determining the mole ratio of water to anhydrous copper(II) sulfate.

brainly.com › chemistry › high school › when hydrated copper(ii) sulfate crystals are heated, anhydrous copper(ii) sulfate forms. a mass of 12.5 g of hydrated copper(ii) sulfate crystals is heated in a crucible until all the water of crystallization is removed. a mass of 8.0 g of anhydrous copper(ii) sulfate forms. calculate the formula of hydrated copper(ii) sulfate \(\text{cuso}_4\cdot n\text{h}_2\text{o}\). show your working. - molar mass (\(m_r\)) of \(\text{cuso}_4 = 159.5\) - molar mass (\(m_r\)) of \(\text{h}_2\text{o} = 18\) steps: 1. mass of water = 12.5 g - 8.0 g = 4.5 g 2. calculate moles of \(\text{cuso}_4\) and \(\text{h}_2\text{o}\) 3. water of crystallization (\(n\)) = ? 4. formula of hydrated copper(ii) sulfate = \(\text{cuso}_4\cdot n\text{h}_2\text{o}\)

[FREE] When hydrated copper(II) sulfate crystals are heated, anhydrous copper(II) sulfate forms. A mass of 12.5 g - brainly.com

The mass of water lost when heating hydrated copper(II) sulfate is 4.5 g. The number of water molecules associated with each formula unit is 5, leading to the final formula of hydrated copper(II) sulfate as CuSO4·5H2O.

quora.com › How-is-the-formula-for-hydrated-copper-II-sulfate-determined

How is the formula for hydrated copper(II) sulfate determined? - Quora

Answer (1 of 2): It forms hydrates CuSO4·nH2O, where n can range from 1 to 7

Dynamic Science

dynamicscience.com.au › tester › solutions1 › chemistry › moleandempiricalformulae.htm

Chemistry - mole and empirical formulae copper sulfate hydrated

Copper sulfate is a crystalline solid that has many water molecules embedded in its lattice structure. The number of water molecules per copper sulfate particle, depends on the conditions the crystals of copper sulfate are in · The formula of hydrated copper sulfate is CuSO4.

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ICSC 1416 - COPPER(II) SULFATE, PENTAHYDRATE

According to UN GHS Criteria · Transportation UN Classification

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Riah Kim - Determine The Formula of Hydrated Copper II Sulfate 1 | PDF | Applied And Interdisciplinary Physics | Chemistry

Controls such as heating temperature and crucible are kept constant. Safety precautions are described to avoid risks from the Bunsen burner. The student heats hydrated copper(II) sulfate in a crucible and measures the initial and final masses to calculate water loss and deduce the formula.Read more

Rating: 5 - 1 votes

brainly.com › chemistry › high school › a 14.00 g sample of hydrated copper(ii) sulfate, [tex] \text{cuso}_4 \cdot n\text{h}_2\text{o} [/tex], is heated to drive off the water. 5.051 g of [tex] \text{h}_2\text{o} [/tex] was released from the sample. what is the value of "n" in the hydrate formula? a. 2 b. 10 c. 3 d. 5

[FREE] A 14.00 g sample of hydrated copper(II) sulfate, \text{CuSO}_4 \cdot n\text{H}_2\text{O} , is heated to - brainly.com

Therefore, CuSO₄·5H₂O is the correct formula for the hydrated copper(II) sulfate.

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copper(II) sulfate pentahydrate (CHEBI:31440)

The pentahydrate of copper(2+) sulfate. A bright blue crystalline solid.

softschools.com › formulas › chemistry › copper_ii_sulfate_formula › 653

Copper (II) Sulfate Formula

Formula and structure: Copper (II) sulfate chemical formula is CuSO4 and the molar mass is 159.60 g mol-1. The compound is commonly found as a hydrated salt with between 1 to 5 molecules of water. The most common hydrated form is the CuSO4.5 H2O. The pentahydrated form has a molecular mass ...

American Elements

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Copper(II) Sulfate Pentahydrate | AMERICAN ELEMENTS ®

Copper(II) Sulfate Pentahydrate is a moderately water and acid soluble Sodium source for uses compatible with sulfates. Sulfate compounds are salts or esters of sulfuric acid formed by replacing one or both of the hydrogens with a metal. Most metal sulfate compounds are readily soluble in water for uses such as water treatment, unlike fluorides and oxides which tend to be insoluble.