Study tool

Compound Analyser

Type any chemical formula — H2O, Ca(OH)2, CuSO4·5H2O — or an everyday name like baking soda. You get the molar mass, the element breakdown, and if the compound is known: its scientific and local names, chemical type, melting/freezing and vapour temperatures, a written description, and how it can be created in the lab. Non-existent formulas are caught and explained.

Chemical formula or name — type below

copper(II) sulfate pentahydrate“blue vitriol”নীল তুতা (ব্লু ভিট্রিয়ল)

verified — in the built-in library (191 compounds)

\mathrm{CuSO_{4}\cdot 5H_{2}O}

249.677 g/mol

Element	Count	Mass	Share
OOxygen	9	143.99 g	57.7%
CuCopper	1	63.55 g	25.5%
SSulfur	1	32.06 g	12.8%
HHydrogen	10	10.08 g	4.0%

Mole ↔ gram converter

mol × 249.68 g/mol = 249.677 g

About copper(II) sulfate pentahydrate

salthydrate

State at 25 °Csolid

Melting pointnone — it decomposes on heating instead of melting

Boiling (vapour) pointnone — it decomposes before boiling

Density2.29 g/cm³

Solubility in watersoluble in water

copper(II) sulfate pentahydrate ( $\mathrm{CuSO_{4}\cdot 5H_{2}O}$ ), better known as blue vitriol, is a solid salt and hydrate whose molar mass works out to 249.677 g/mol. In Bengali it is called নীল তুতা (ব্লু ভিট্রিয়ল).

It has no honest melting or boiling story: on strong heating it decomposes before it can melt or boil. The bonding is polar covalent: Oxygen and Copper differ by 1.54 electronegativity units, so the shared electrons lean toward one atom.

By mass it is 57.7% O, 25.5% Cu, 12.8% S and the rest.

The blue crystals of every school bench; with lime it makes Bordeaux mixture for crops.

How it can be created

\mathrm{CuO}

\mathrm{H_{2}SO_{4}}

\mathrm{CuSO_{4}}

\mathrm{H_{2}O}

at room temperature

Equations are balanced as written; conditions are the usual textbook ones.

⚠ Handle with care:harmful if misusedirritant

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How the analyser works

Step 1 — parse: a deterministic parser reads your formula exactly the way your textbook does. Symbols are case-sensitive (CO is carbon monoxide, Co is cobalt), brackets multiply their contents, hydrate dots add waters of crystallisation, and lowercase input like h2so4 is auto-corrected. The molar mass comes from this site’s own periodic table, so the two can never disagree.

Step 2 — validate: ion-charge arithmetic checks that cations and anions balance to a neutral compound (so NaCl2 is caught and corrected to NaCl), noble-gas rules catch impossible partners, and the formula is looked up in a built-in library of 191 curated compounds with reference data. Formulas the library doesn’t know get one more chance: when you are online, PubChem’s open database is asked whether any real substance with that exact molecular formula exists — if not, you are told plainly.

Step 3 — describe: the sentences in the About card are assembled by template code from the structured data — names, temperatures, solubility, ion reading and electronegativity differences — which is why they read like a teacher wrote them while staying exactly reproducible. No AI service is called, and nothing you type leaves your browser except the optional PubChem formula lookup.