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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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First Ionization energy exceptions

Jan 29, 2015 · Replies 1 · Jan 29, 2015

Replies: 1

Views: 2K

Periodic trends and effective nuclear charge

Jan 28, 2015 · Replies 1 · Jan 28, 2015

Replies: 1

Views: 2K

Supercooled ethanol/distilled water solution

Jan 25, 2015 · Replies 6 · Jan 28, 2015

Replies: 6

Views: 3K

Surface area contact with catalyst effect on hydrogen redox

Jan 24, 2015 · Replies 1 · Jan 27, 2015

Replies: 1

Views: 2K

Sodium hydride from sodium and hydrochloric acid

Jan 25, 2015 · Replies 7 · Jan 26, 2015

Replies: 7

Views: 3K

Making Liquid CO2: Is It Possible?

Jan 26, 2015 · Replies 2 · Jan 26, 2015

Replies: 2

Views: 2K

Difference between molecular mass and molar mass

Jan 25, 2015 · Replies 13 · Jan 26, 2015

Replies: 13

Views: 3K

Free energy in the free expansion of an ideal gas

Jan 23, 2015 · Replies 3 · Jan 24, 2015

Replies: 3

Views: 2K

Problem with corrosion of gypsum cement

Jan 22, 2015 · Replies 8 · Jan 23, 2015

Replies: 8

Views: 4K

Classical gases not necessarily ideal

Jan 21, 2015 · Replies 12 · Jan 22, 2015

Replies: 12

Views: 2K

Heating CaO to create intense light

Nov 9, 2014 · Replies 9 · Jan 22, 2015

Replies: 9

Views: 4K

What is Kr2+ electron configuration?

Jan 21, 2015 · Replies 2 · Jan 21, 2015

Replies: 2

Views: 6K

How Can the Rate of One Reactant Reveal the Whole Reaction in Chemical Kinetics?

Jan 20, 2015 · Replies 7 · Jan 20, 2015

Replies: 7

Views: 3K

Relative stability of ortho and para isomers

Jan 15, 2015 · Replies 2 · Jan 20, 2015

Replies: 2

Views: 5K

Charge of an Ion - What Does "+1" Mean?

Jan 19, 2015 · Replies 2 · Jan 19, 2015

Replies: 2

Views: 2K

Europiums electron configuration

Jan 19, 2015 · Replies 9 · Jan 19, 2015

Replies: 9

Views: 2K

Do Any Chemicals Undergo Reverse Phase Transitions?

Jan 16, 2015 · Replies 2 · Jan 17, 2015

Replies: 2

Views: 1K

Litmus on Aldehydes,Ketones,Alcohols,Amines.

Jan 16, 2015 · Replies 10 · Jan 17, 2015

Replies: 10

Views: 22K

Exciton Diffusion Length in P3HT:PCBM BHJ Cells

Jan 14, 2015 · Replies 3 · Jan 16, 2015

Replies: 3

Views: 3K

What-where is the proof for Avogadro΄s law?

Jan 6, 2015 · Replies 17 · Jan 15, 2015

Replies: 17

Views: 6K

Can a Thermos Truly Keep Water Hot Forever?

Jan 14, 2015 · Replies 2 · Jan 15, 2015

Replies: 2

Views: 2K

Questions on Magnetism and Domains

Jan 13, 2015 · Replies 1 · Jan 14, 2015

Replies: 1

Views: 2K

DFT Hybrid Functionals: Inclusion of HF Exact Exchange Energies

Dec 24, 2014 · Replies 8 · Jan 13, 2015

Replies: 8

Views: 4K

Fossil Fuels vs. Natural Gas: Carbon Emissions Explained

Jan 13, 2015 · Replies 2 · Jan 13, 2015

Replies: 2

Views: 2K

How water, CO2, sand etc extinguish fire?

Jan 12, 2015 · Replies 12 · Jan 12, 2015

Replies: 12

Views: 7K

Can rechargeable batteries last for 3-4 years with 24h use at 5-15 volts?

Jan 12, 2015 · Replies 33 · Jan 12, 2015

2

Replies: 33

Views: 4K

What Are Some Alternative Fixed Temperature Baths for Accurate Calibration Data?

Dec 28, 2014 · Replies 2 · Jan 12, 2015

Replies: 2

Views: 1K

Why does degree of dissociation increase with decreasing concentration?

Jan 10, 2015 · Replies 9 · Jan 11, 2015

Replies: 9

Views: 2K

Reduction of quaternary ammonium salt

Jan 4, 2015 · Replies 3 · Jan 11, 2015

Replies: 3

Views: 3K

Voltaic (Daniell) Cell: Zinc Oxidation Explained

Jan 10, 2015 · Replies 3 · Jan 10, 2015

Replies: 3

Views: 2K

What Are Some Good Beginner Chemistry Experiments to Try at Home?

Dec 18, 2014 · Replies 6 · Jan 10, 2015

Replies: 6

Views: 2K

Energy of reaction: per moles of what?

Jan 10, 2015 · Replies 4 · Jan 10, 2015

Replies: 4

Views: 2K

Can Ammonium Bicarbonate 'salt out' ethanol alcohol?

Dec 18, 2014 · Replies 3 · Jan 9, 2015

Replies: 3

Views: 3K

What is the independent variable in Boyle's Law?

Jan 8, 2015 · Replies 7 · Jan 9, 2015

Replies: 7

Views: 24K

Formation of Excimer Structures: Explained for Engineers

Nov 8, 2014 · Replies 1 · Jan 8, 2015

Replies: 1

Views: 2K

Is HCl a Molecular or Ionic Compound?

Dec 23, 2014 · Replies 2 · Jan 8, 2015

Replies: 2

Views: 34K

Kinetic equilibrium of chemical reaction

Jan 7, 2015 · Replies 1 · Jan 7, 2015

Replies: 1

Views: 2K

What Causes Magnetism and Repulsion in Magnets?

Dec 28, 2014 · Replies 7 · Jan 7, 2015

Replies: 7

Views: 2K

What really are resonance structures?

Jan 1, 2015 · Replies 9 · Jan 7, 2015

Replies: 9

Views: 3K

3d printing with Polylactic acid, adhesion to print bed

Nov 6, 2013 · Replies 1 · Jan 5, 2015

Replies: 1

Views: 3K

What is the Acid Used in Strecker Amino Acid Synthesis?

Jan 4, 2015 · Replies 7 · Jan 5, 2015

Replies: 7

Views: 2K

IUPAC naming - choosing the main branch doubts

Jan 4, 2015 · Replies 2 · Jan 4, 2015

Replies: 2

Views: 2K

How to Calculate Energy for Atmospheric Molecule Reaction and Isolate Gases?

Jan 4, 2015 · Replies 4 · Jan 4, 2015

Replies: 4

Views: 2K

General Formula of benzene and diacetylene

Jan 3, 2015 · Replies 3 · Jan 3, 2015

Replies: 3

Views: 2K

How do electrolytes conduct electricity without redox?

Jan 2, 2015 · Replies 8 · Jan 3, 2015

Replies: 8

Views: 3K

Starlite and thermal barrier fun

Dec 29, 2014 · Replies 2 · Dec 30, 2014

Replies: 2

Views: 2K

Is the Flask Closed or Open to Atmosphere During Reflux Heating?

Dec 26, 2014 · Replies 4 · Dec 29, 2014

Replies: 4

Views: 2K

Why does copper have a higher melting point than aluminium?

Dec 28, 2014 · Replies 2 · Dec 28, 2014

Replies: 2

Views: 7K

If 3d is higher in energy than 4S, how is 4s ionised first?

Dec 28, 2014 · Replies 1 · Dec 28, 2014

Replies: 1

Views: 2K

Hydrogen electrode incoherence?

Nov 8, 2014 · Replies 5 · Dec 28, 2014

Replies: 5

Views: 2K

Gasoline smell does not inginte

Dec 27, 2014 · Replies 2 · Dec 27, 2014

Replies: 2

Views: 3K

How is the Electron Configuration of Central Atoms in Complex Salts Determined?

Dec 27, 2014 · Replies 12 · Dec 27, 2014

Replies: 12

Views: 2K

Electrolysis of Water to Create NaOH

Dec 27, 2014 · Replies 7 · Dec 27, 2014

Replies: 7

Views: 2K

Titanium Dioxide(TiO2) vs Tin Oxide(Sn3O4)

Dec 26, 2014 · Replies 1 · Dec 26, 2014

Replies: 1

Views: 3K

How does the balanced chemical equation tell us the state?

Dec 24, 2014 · Replies 3 · Dec 25, 2014

Replies: 3

Views: 2K

Molar Volume of Sodium at Boiling Point | Help Needed

Dec 23, 2014 · Replies 3 · Dec 24, 2014

Replies: 3

Views: 2K

C-13 NMR Query in 2-Aminobutane: C3 Resonance

Dec 23, 2014 · Replies 1 · Dec 23, 2014

Replies: 1

Views: 1K

Oxidation Reaction: SO2 to H2SO4?

Dec 23, 2014 · Replies 9 · Dec 23, 2014

Replies: 9

Views: 3K

Why is H2SO4 used in the contact process for sulfuric acid production?

Dec 23, 2014 · Replies 16 · Dec 23, 2014

Replies: 16

Views: 2K

Diamagnetic Liquid: Explained & Demonstrated

Dec 22, 2014 · Replies 1 · Dec 22, 2014

Replies: 1

Views: 3K

D & L Glucose: Haworth Formula Explained

Dec 22, 2014 · Replies 1 · Dec 22, 2014

Replies: 1

Views: 2K

Synthesizing Diphenyl Oxalate: Esterification of Phenol and Oxalic Acid

Oct 3, 2014 · Replies 24 · Dec 22, 2014

Replies: 24

Views: 8K

Question about alcohol protonation

Dec 17, 2014 · Replies 2 · Dec 20, 2014

Replies: 2

Views: 2K

Question on Keq and how water affects certain reactions

Oct 2, 2014 · Replies 15 · Dec 19, 2014

Replies: 15

Views: 5K

How do you create pitted corrosion on steel with acid?

Dec 18, 2014 · Replies 3 · Dec 19, 2014

Replies: 3

Views: 6K

Poll

Food Chemist vs. Chemical Engineer- Help

Dec 19, 2014 · Replies 5 · Dec 19, 2014

Replies: 5

Views: 4K

Why (and how) do foods stick to a pan?

Dec 18, 2014 · Replies 1 · Dec 19, 2014

Replies: 1

Views: 2K

Oleum Fuming: Investigating the Physical Mechanism

Dec 17, 2014 · Replies 5 · Dec 18, 2014

Replies: 5

Views: 3K

Why is the relative atomic mass always changing?

Dec 17, 2014 · Replies 1 · Dec 17, 2014

Replies: 1

Views: 1K

Why hydrogen is not used to compare the relative atomic mass

Dec 17, 2014 · Replies 1 · Dec 17, 2014

Replies: 1

Views: 2K

Potassium hydrooxide is nucleophile or base

Dec 17, 2014 · Replies 1 · Dec 17, 2014

Replies: 1

Views: 1K

Why Does the 31P NMR Spectrum of PF5 Depend on Temperature?

Dec 14, 2014 · Replies 4 · Dec 16, 2014

Replies: 4

Views: 3K

Sodium dithionite reducing properties of nh3

Dec 15, 2014 · Replies 6 · Dec 15, 2014

Replies: 6

Views: 2K

BP & MP of Caffeine: 178°C & 236.2°C

Dec 15, 2014 · Replies 9 · Dec 15, 2014

Replies: 9

Views: 8K

What is the Entropy of a Half Reaction?

Dec 13, 2014 · Replies 6 · Dec 13, 2014

Replies: 6

Views: 2K

Why isn't the ion NH4+ capable of hydrogen bonding?

Nov 17, 2014 · Replies 11 · Dec 13, 2014

Replies: 11

Views: 11K

What is the structural component of disjoining pressure?

Dec 12, 2014 · Replies 1 · Dec 12, 2014

Replies: 1

Views: 2K

Electrochemistry: reference electrode

Dec 11, 2014 · Replies 6 · Dec 11, 2014

Replies: 6

Views: 2K

Blast furnace and iron ore - help to understand?

Dec 9, 2014 · Replies 5 · Dec 11, 2014

Replies: 5

Views: 3K

Which Type of Bond is Strongest in Chemistry?

Dec 11, 2014 · Replies 1 · Dec 11, 2014

Replies: 1

Views: 3K

Supercooled Liquid: What is it & How Does it Become Glass?

Dec 11, 2014 · Replies 2 · Dec 11, 2014

Replies: 2

Views: 2K

Elementary Rate Law: Hydrogen Radical Termination Step

Dec 10, 2014 · Replies 4 · Dec 11, 2014

Replies: 4

Views: 2K

Determining Compound Dipole Moment for Finals

Dec 10, 2014 · Replies 5 · Dec 10, 2014

Replies: 5

Views: 2K

Significant Figures in Conversion Factors

Dec 10, 2014 · Replies 1 · Dec 10, 2014

Replies: 1

Views: 2K

Can Metal-Bromine Batteries Be the Next Big Thing in Energy Storage?

Sep 15, 2014 · Replies 5 · Dec 9, 2014

Replies: 5

Views: 3K

Unraveling the Mystery: Why Does the Bottle Shrink?

Dec 8, 2014 · Replies 11 · Dec 9, 2014

Replies: 11

Views: 2K

How to write Stoichiometric ratio of a reaction?

Dec 7, 2014 · Replies 8 · Dec 8, 2014

Replies: 8

Views: 2K

Science of materials and energy

Dec 7, 2014 · Replies 8 · Dec 7, 2014

Replies: 8

Views: 2K

Why isn't solution state a true physical state ?

Dec 6, 2014 · Replies 7 · Dec 7, 2014

Replies: 7

Views: 2K

Volume of Two Gases: Does Adding Apply?

Dec 6, 2014 · Replies 9 · Dec 7, 2014

Replies: 9

Views: 3K

Can an electric arc cause a combustion or fire if

Dec 5, 2014 · Replies 2 · Dec 6, 2014

Replies: 2

Views: 2K

I am a non scientist and would like to know easiest way

Dec 4, 2014 · Replies 28 · Dec 6, 2014

Replies: 28

Views: 3K

Ideal gasses, bonds and partition functions

Dec 3, 2014 · Replies 1 · Dec 4, 2014

Replies: 1

Views: 2K

Question about halogenation of benzene

Dec 3, 2014 · Replies 2 · Dec 4, 2014

Replies: 2

Views: 3K

How to tell crystalline from amorphous on touch?

Dec 4, 2014 · Replies 1 · Dec 4, 2014

Replies: 1

Views: 1K

Synthesize Propyne: Best Method Explained

Dec 1, 2014 · Replies 2 · Dec 4, 2014

Replies: 2

Views: 4K

In the haber process why is the yield higher when liquid?

Dec 2, 2014 · Replies 8 · Dec 3, 2014

Replies: 8

Views: 1K

Which lab equipment should we use to mix a thick solution?

Dec 1, 2014 · Replies 13 · Dec 3, 2014

Replies: 13

Views: 2K

How can neon have a melting point?

Nov 5, 2014 · Replies 3 · Dec 3, 2014

Replies: 3

Views: 4K

Maximum work can be obtained from reversible process ?

Dec 2, 2014 · Replies 1 · Dec 3, 2014

Replies: 1

Views: 2K

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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