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Chemistry Forum

Join the expert discussion on chemistry. Chemistry is the study of the nature, properties, and composition of matter. Biochemistry, Organic, Inorganic, Analytical are topics that may be discussed.

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Has anyone ever dealt with limescale in a bathroom sink?

Mar 14, 2018 · Replies 46 · Feb 20, 2019

2

Replies: 46

Views: 11K

Challenge Thermochemistry Challenge Problem - Chet's Paradox

May 4, 2017 · Replies 22 · Feb 19, 2019

Replies: 22

Views: 8K

Gas Solubility in water - constants, and calculations

Feb 15, 2019 · Replies 8 · Feb 19, 2019

Replies: 8

Views: 4K

How can KCl be enriched in 40K at home?

Feb 11, 2019 · Replies 18 · Feb 12, 2019

Replies: 18

Views: 4K

How can I understand a chemical reaction?

Jan 28, 2019 · Replies 4 · Feb 12, 2019

Replies: 4

Views: 3K

Can We Generate HOD Clathrate?

Jan 29, 2019 · Replies 6 · Feb 9, 2019

Replies: 6

Views: 3K

Enzymatic surface for multistep reactions

Feb 4, 2019 · Replies 1 · Feb 4, 2019

Replies: 1

Views: 2K

Is Diffusion Possible in Solids?

Jan 27, 2019 · Replies 16 · Feb 2, 2019

Replies: 16

Views: 7K

Higher and Lower heat value of combustion of Coal?

Jan 24, 2019 · Replies 5 · Jan 28, 2019

Replies: 5

Views: 3K

A new scale for electronegativity

Jan 26, 2019 · Replies 3 · Jan 27, 2019

Replies: 3

Views: 4K

Secondary ions entering a mass filter in Secondary Ion Mass Sprectrometry (SIMS)

Jan 25, 2019 · Replies 2 · Jan 25, 2019

Replies: 2

Views: 2K

Calculating charge density of particular ligands

Jan 22, 2019 · Replies 2 · Jan 23, 2019

Replies: 2

Views: 3K

CO2 [ppm] exposure relative to room volume [m^3] and air ventilation

Dec 13, 2018 · Replies 12 · Jan 23, 2019

Replies: 12

Views: 6K

Neucleophilic Acyl substitution of unsymmetrical Acid Anhydrides

Oct 19, 2011 · Replies 1 · Jan 18, 2019

Replies: 1

Views: 5K

Chemical Industry Data: Sources for Production & Prices

Jan 17, 2019 · Replies 3 · Jan 18, 2019

Replies: 3

Views: 3K

Why Doesn't Hydrogen Bonding Occur Through Skin Contact?

Jan 11, 2019 · Replies 7 · Jan 13, 2019

Replies: 7

Views: 3K

Portable chemical sensing technology

Jan 10, 2019 · Replies 3 · Jan 10, 2019

Replies: 3

Views: 2K

How to clean lead and tin off silver the smart way?

Jan 5, 2019 · Replies 16 · Jan 9, 2019

Replies: 16

Views: 6K

Difference - chemical formula and Idealised chemical formula

Dec 29, 2018 · Replies 8 · Jan 8, 2019

Replies: 8

Views: 4K

Relationship between ln k and 1/t using different formula

Jan 4, 2019 · Replies 2 · Jan 4, 2019

Replies: 2

Views: 8K

Does the Potential Energy increase during Chemical Bonding?

Jan 3, 2019 · Replies 2 · Jan 3, 2019

Replies: 2

Views: 2K

Question about metallic ions and a molecule

Dec 31, 2018 · Replies 6 · Dec 31, 2018

Replies: 6

Views: 2K

Could Hydrogen Sulfide Improve the Kraft Process?

Dec 28, 2018 · Replies 1 · Dec 30, 2018

Replies: 1

Views: 2K

Reverse Engineering Plastics: Is It Cost Effective?

Dec 29, 2018 · Replies 4 · Dec 29, 2018

Replies: 4

Views: 2K

Replace Kroll Process: Extracting Titanium Dioxide from Rutile

Dec 28, 2018 · Replies 1 · Dec 28, 2018

Replies: 1

Views: 2K

Can Euler's Formula Illuminate First Order Reaction Kinetics?

Dec 25, 2018 · Replies 5 · Dec 27, 2018

Replies: 5

Views: 2K

Producing other metals with thermite reactions

Dec 20, 2018 · Replies 12 · Dec 26, 2018

Replies: 12

Views: 5K

Carbon nanotubes from human-crafted nanopores?

Dec 17, 2018 · Replies 4 · Dec 20, 2018

Replies: 4

Views: 3K

What is the density of Al0.1GaN and its material properties?

Dec 19, 2018 · Replies 4 · Dec 20, 2018

Replies: 4

Views: 4K

Simple method for testing graphene

Dec 18, 2018 · Replies 9 · Dec 18, 2018

Replies: 9

Views: 5K

Semiconductors GaN, AlGaN -- Questions about abbreviations

Dec 17, 2018 · Replies 5 · Dec 17, 2018

Replies: 5

Views: 2K

Is this another hydrogen vehicle scam?

Feb 19, 2018 · Replies 12 · Dec 17, 2018

Replies: 12

Views: 4K

What is acet in organic chemistry?

Dec 15, 2018 · Replies 3 · Dec 15, 2018

Replies: 3

Views: 4K

Seeking White Powder Alkali Indicator (that can take 900°C)

Dec 12, 2018 · Replies 7 · Dec 13, 2018

Replies: 7

Views: 2K

Chemical bonding during touching

Dec 13, 2018 · Replies 4 · Dec 13, 2018

Replies: 4

Views: 2K

Chemical reaction that can be used for baby gender reveal

Dec 11, 2018 · Replies 3 · Dec 11, 2018

Replies: 3

Views: 4K

Why do gases occupy different volumes in eudiometry?

Dec 11, 2018 · Replies 1 · Dec 11, 2018

Replies: 1

Views: 2K

What is the liquid used to break stone slabs?

Nov 30, 2018 · Replies 8 · Dec 7, 2018

Replies: 8

Views: 4K

Spin of a nucleus within an external magnetic field.

Dec 5, 2018 · Replies 8 · Dec 7, 2018

Replies: 8

Views: 3K

Is Melted Bismuth safe to wear as a necklace?

Oct 17, 2018 · Replies 19 · Dec 7, 2018

Replies: 19

Views: 13K

Oxidisation of methanoic acid by kmno4

Nov 30, 2018 · Replies 6 · Dec 4, 2018

Replies: 6

Views: 6K

Atmospheric pressure- where do we get the mass?

Nov 26, 2018 · Replies 42 · Dec 3, 2018

2

Replies: 42

Views: 6K

Can Composition Reveal Solute Concentration?

Nov 29, 2018 · Replies 12 · Nov 30, 2018

Replies: 12

Views: 3K

Does moisture increase friction on skin?

Nov 28, 2018 · Replies 3 · Nov 28, 2018

Replies: 3

Views: 3K

Why is the universal gas constant a constant?

Nov 26, 2018 · Replies 8 · Nov 27, 2018

Replies: 8

Views: 3K

What is the chemical formula for moist air at 20°C?

Nov 26, 2018 · Replies 15 · Nov 26, 2018

Replies: 15

Views: 2K

Experimental procedure for growing piezoelectric crystals

Nov 25, 2018 · Replies 6 · Nov 26, 2018

Replies: 6

Views: 3K

Can liquid ammonia NH3 be electrolyzed?

Nov 22, 2018 · Replies 6 · Nov 23, 2018

Replies: 6

Views: 3K

Disolving NaCl in deionized water gives high pH value

Nov 20, 2018 · Replies 21 · Nov 22, 2018

Replies: 21

Views: 5K

How dangerous is exposure to chromium-6?

Nov 19, 2018 · Replies 8 · Nov 20, 2018

Replies: 8

Views: 3K

Ferrous Sulfate Crystallization

Nov 18, 2018 · Replies 1 · Nov 19, 2018

Replies: 1

Views: 3K

Polypropylene question: "high heat tolerance"

Nov 6, 2018 · Replies 7 · Nov 10, 2018

Replies: 7

Views: 4K

What is the smell from the new plastic storage box

Nov 4, 2018 · Replies 5 · Nov 10, 2018

Replies: 5

Views: 4K

Detecting Trace Metal Contamination in Lab Rooms: Methods and Protocols

Nov 8, 2018 · Replies 3 · Nov 10, 2018

Replies: 3

Views: 2K

CH2OH substituent on Chair Conformations and Haworth Project

Nov 8, 2018 · Replies 1 · Nov 8, 2018

Replies: 1

Views: 2K

Fischer Projection to Haworth/Chair Conformation

Nov 8, 2018 · Replies 1 · Nov 8, 2018

Replies: 1

Views: 4K

Can Copper Patina be Applied to Lead-Free Solder in Stained Glass Work?

Nov 3, 2018 · Replies 3 · Nov 4, 2018

Replies: 3

Views: 5K

Does resonance always affect acidity and basicity?

Oct 31, 2018 · Replies 1 · Nov 4, 2018

Replies: 1

Views: 3K

New materials and ways to store electric energy

Nov 2, 2018 · Replies 2 · Nov 2, 2018

Replies: 2

Views: 2K

Can NH2 with no formal charge on it be protonated?

Oct 31, 2018 · Replies 3 · Nov 2, 2018

Replies: 3

Views: 4K

Why is Pressure Volume Work called P*delta V

Oct 30, 2018 · Replies 2 · Oct 31, 2018

Replies: 2

Views: 3K

What factors determine the acidity of hydrogens in vitamin C?

Oct 28, 2018 · Replies 4 · Oct 30, 2018

Replies: 4

Views: 3K

Could heating stainless steel release any harmful materials?

Oct 26, 2018 · Replies 6 · Oct 30, 2018

Replies: 6

Views: 5K

Why is this equation about adding pure substances correct?

Oct 29, 2018 · Replies 5 · Oct 29, 2018

Replies: 5

Views: 2K

How volatile is urea in a water mixture?

Oct 24, 2018 · Replies 3 · Oct 29, 2018

Replies: 3

Views: 4K

What solvents are best for SN1 and E2 reactions?

Oct 22, 2018 · Replies 1 · Oct 23, 2018

Replies: 1

Views: 2K

Why are non-polar molecules attracted to each other?

Oct 22, 2018 · Replies 3 · Oct 22, 2018

Replies: 3

Views: 7K

Basic Nickel-Iron Battery Experiment

Oct 22, 2018 · Replies 3 · Oct 22, 2018

Replies: 3

Views: 2K

How to calculate kinetics values?

Oct 21, 2018 · Replies 5 · Oct 22, 2018

Replies: 5

Views: 2K

Is this really an excited state?

Oct 19, 2018 · Replies 2 · Oct 20, 2018

Replies: 2

Views: 3K

Plastic formation in cast-iron pan

Oct 18, 2018 · Replies 3 · Oct 18, 2018

Replies: 3

Views: 3K

Trouble in understanding a few points of colligative properties

Oct 16, 2018 · Replies 3 · Oct 16, 2018

Replies: 3

Views: 2K

Where do vacant p-orbitals come from?

Oct 15, 2018 · Replies 3 · Oct 16, 2018

Replies: 3

Views: 4K

Why Do Different Materials Use Different Units for the Absorption Coefficient?

Oct 11, 2018 · Replies 5 · Oct 15, 2018

Replies: 5

Views: 4K

Investigating the Stoichiometry of Reactions 1 & 2

Oct 13, 2018 · Replies 2 · Oct 14, 2018

Replies: 2

Views: 2K

Stabilize H2O2: Sodium Stanate & Phosphoric Acid

Oct 13, 2018 · Replies 1 · Oct 13, 2018

Replies: 1

Views: 3K

Most Accepted Theory For Covalent Bonding

Oct 10, 2018 · Replies 9 · Oct 12, 2018

Replies: 9

Views: 3K

RedOx Reactions & Phase Changes

Oct 10, 2018 · Replies 5 · Oct 11, 2018

Replies: 5

Views: 2K

Scrap Steel Refining: Separating Metals for New Steel

Oct 10, 2018 · Replies 4 · Oct 10, 2018

Replies: 4

Views: 2K

Beer's law experiment - parameters

Oct 9, 2018 · Replies 7 · Oct 10, 2018

Replies: 7

Views: 2K

How to Thin Si02 for Automotive Repair

Oct 9, 2018 · Replies 7 · Oct 9, 2018

Replies: 7

Views: 2K

Suspending Chrome oxide polishing powder

Oct 7, 2018 · Replies 2 · Oct 9, 2018

Replies: 2

Views: 2K

Nitrogen Oxidizing properties at high temperature

Oct 9, 2018 · Replies 2 · Oct 9, 2018

Replies: 2

Views: 2K

Problems with Raman Spectroscopy

Sep 18, 2018 · Replies 5 · Oct 8, 2018

Replies: 5

Views: 3K

Electrolysis of NaHCO3 solution with lead electrodes

Oct 2, 2018 · Replies 2 · Oct 8, 2018

Replies: 2

Views: 3K

How Does Adding CuSO4 Affect the Nernst Equation in Concentration Cells?

Oct 3, 2018 · Replies 9 · Oct 8, 2018

Replies: 9

Views: 2K

Molten Aluminium: Health Risks & Safety Tips

Oct 2, 2018 · Replies 7 · Oct 3, 2018

Replies: 7

Views: 6K

Isotope applications in Agriculture industry

Sep 30, 2018 · Replies 3 · Oct 2, 2018

Replies: 3

Views: 2K

How Does Activating ZnS with Sub-ppm Ag Work?

Sep 25, 2018 · Replies 7 · Sep 28, 2018

Replies: 7

Views: 2K

Lemonade bomb (spoiler alert for "The Foreigner")

Apr 29, 2018 · Replies 9 · Sep 23, 2018

Replies: 9

Views: 19K

Nernst Equation with Pressure Differences

Sep 17, 2018 · Replies 2 · Sep 18, 2018

Replies: 2

Views: 2K

Where can I purchase some iron and nickel foams?

Sep 16, 2018 · Replies 1 · Sep 17, 2018

Replies: 1

Views: 2K

Which orbital is lower in energy

Sep 14, 2018 · Replies 1 · Sep 14, 2018

Replies: 1

Views: 2K

Sn-125 (Tin-125): Usage & Information

Sep 12, 2018 · Replies 2 · Sep 14, 2018

Replies: 2

Views: 2K

Why helium is easier to ionize than N2?

Sep 1, 2018 · Replies 6 · Sep 13, 2018

Replies: 6

Views: 5K

How does 1,4 H elimination work in butene?

Sep 12, 2018 · Replies 2 · Sep 13, 2018

Replies: 2

Views: 1K

No covalent bond formation due to repulsion

Sep 12, 2018 · Replies 1 · Sep 12, 2018

Replies: 1

Views: 2K

Can someone help with some lab results please (a KF Triation result)

Sep 11, 2018 · Replies 1 · Sep 11, 2018

Replies: 1

Views: 2K

Ammonia is a strong or weak field ligand?

Sep 1, 2018 · Replies 6 · Sep 4, 2018

Replies: 6

Views: 5K

Quick question - orientation of a hydrophobic / hydrophilic molecule

May 14, 2018 · Replies 3 · Sep 3, 2018

Replies: 3

Views: 5K

Chemistry

Welcome to the Chemistry forum!

Chemistry is the scientific study of matter, its properties, composition, structure, and the changes it undergoes during chemical reactions. It plays a central role in understanding the building blocks of the universe, encompassing the study of atoms, molecules, elements, and compounds.

Chemists investigate the interactions and forces between particles at the atomic and molecular levels, contributing to our understanding of various natural phenomena. The field is divided into branches such as organic chemistry, inorganic chemistry, physical chemistry, and biochemistry, each focusing on specific aspects of chemical systems.

Chemistry is not only a foundational science but also a driving force behind technological advancements, materials development, pharmaceuticals, and numerous industrial applications.

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