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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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Why can substances with endothermic heat of solution dissolve?

Feb 4, 2014 · Replies 1 · Feb 5, 2014

Replies: 1

Views: 2K

Gas Phase Ion Chemistry vs. Plasma Chemistry

Feb 4, 2014 · Replies 3 · Feb 4, 2014

Replies: 3

Views: 2K

Why does a silicon atom in a silicon lattice have 4 single bonds?

Feb 4, 2014 · Replies 3 · Feb 4, 2014

Replies: 3

Views: 3K

Is it Possible to Flash Freeze the Human Brain and Send it into Space?

Feb 3, 2014 · Replies 3 · Feb 3, 2014

Replies: 3

Views: 2K

What is the difference between gibbs free energy and activation energy

Feb 3, 2014 · Replies 1 · Feb 3, 2014

Replies: 1

Views: 18K

When do you use q=mc(Tf-Ti) versus q=c(Tf-Ti) in thermochemistry calculations?

Feb 2, 2014 · Replies 2 · Feb 3, 2014

Replies: 2

Views: 3K

Hybridization of orbitals for Phosphorus in Phosphate Ion

Jan 29, 2014 · Replies 3 · Feb 3, 2014

Replies: 3

Views: 10K

Slow precipitation of calcium carbonate.

Jan 30, 2014 · Replies 2 · Feb 2, 2014

Replies: 2

Views: 3K

Chemical transformation (Decomposition)

Feb 1, 2014 · Replies 1 · Feb 1, 2014

Replies: 1

Views: 2K

Oxidation number in acidic medium

Jan 31, 2014 · Replies 7 · Feb 1, 2014

Replies: 7

Views: 5K

Displacement reaction at solubulity limit. Does it stop or precipitate

Jan 16, 2014 · Replies 1 · Jan 31, 2014

Replies: 1

Views: 2K

Can a Gas Remain the Same Temp When Compressed?

Jan 31, 2014 · Replies 1 · Jan 31, 2014

Replies: 1

Views: 2K

What Could Be Causing Fluctuations in Quantum Yield Measurements?

Jan 31, 2014 · Replies 1 · Jan 31, 2014

Replies: 1

Views: 3K

What Defines a Feeble Acid in Chemistry?

Jan 31, 2014 · Replies 5 · Jan 31, 2014

Replies: 5

Views: 4K

A few questions about anodization

Jan 26, 2014 · Replies 5 · Jan 30, 2014

Replies: 5

Views: 2K

What is the relationship between ΔG, ΔH, and ΔS in thermodynamics?

Jan 29, 2014 · Replies 3 · Jan 30, 2014

Replies: 3

Views: 2K

Proper material for electrolytic cell?

Jan 28, 2014 · Replies 4 · Jan 30, 2014

Replies: 4

Views: 2K

What exactly causes osmotic pressure?

Jan 29, 2014 · Replies 1 · Jan 30, 2014

Replies: 1

Views: 4K

Phosphorous ion in solution and subsequent electromigration?

Jan 29, 2014 · Replies 1 · Jan 29, 2014

Replies: 1

Views: 2K

Cross Cannizzaro and Intramolecular Cannizzaro

Jan 28, 2014 · Replies 2 · Jan 29, 2014

Replies: 2

Views: 6K

Are there any material that contact with water and expand?

Jan 28, 2014 · Replies 8 · Jan 29, 2014

Replies: 8

Views: 18K

Anyone have experience with recovering silver from fix?

Jan 28, 2014 · Replies 4 · Jan 28, 2014

Replies: 4

Views: 2K

Kinetics Assumptions: Approximations & Equilibria

Jan 23, 2014 · Replies 13 · Jan 28, 2014

Replies: 13

Views: 3K

How to Purify Acetone with Magnesium Sulphate & Activated Carbon

Jan 27, 2014 · Replies 1 · Jan 27, 2014

Replies: 1

Views: 4K

Limitations of the nernst equation

Jan 24, 2014 · Replies 5 · Jan 26, 2014

Replies: 5

Views: 6K

Solving Depigmentation Problem in Hair Extensions

Sep 14, 2012 · Replies 5 · Jan 26, 2014

Replies: 5

Views: 9K

What is the Correct Method for Measuring CO2 Gas Volume?

Jan 13, 2014 · Replies 12 · Jan 24, 2014

Replies: 12

Views: 4K

Are all exothermic processes exergonic?

Jan 15, 2014 · Replies 11 · Jan 24, 2014

Replies: 11

Views: 3K

Determining Charges of Polyatomic ions

Jan 23, 2014 · Replies 3 · Jan 24, 2014

Replies: 3

Views: 8K

Mechanism of Oobleck - Non-Newtonian Fluid

Jan 24, 2014 · Replies 1 · Jan 24, 2014

Replies: 1

Views: 2K

Why are Tertiary Alkyl Halides More Reactive Than Secondary and Primary Ones?

Jan 23, 2014 · Replies 7 · Jan 24, 2014

Replies: 7

Views: 4K

Donnan equilibrium -how is the potential difference caused?

Jan 21, 2014 · Replies 10 · Jan 24, 2014

Replies: 10

Views: 5K

Substance or chemical reaction, that is highest rate in changing mass

Jan 23, 2014 · Replies 4 · Jan 23, 2014

Replies: 4

Views: 2K

What is the energy of an atom and does it exist when heat energy is absent?

Jan 22, 2014 · Replies 2 · Jan 22, 2014

Replies: 2

Views: 2K

Optical Activity: How Do Chiral Molecules Rotate Light?

Jan 20, 2014 · Replies 5 · Jan 21, 2014

Replies: 5

Views: 3K

Determination the compound is organic or inorganic

Jan 18, 2014 · Replies 3 · Jan 19, 2014

Replies: 3

Views: 7K

Electron behavior in covalent bonds

Jan 17, 2014 · Replies 6 · Jan 18, 2014

Replies: 6

Views: 5K

Homebrewing beer and galvanic corrosion

Jan 16, 2014 · Replies 3 · Jan 16, 2014

Replies: 3

Views: 4K

Determining ethanol and methanol content in homemade booze

Jan 13, 2014 · Replies 16 · Jan 15, 2014

Replies: 16

Views: 13K

Gas collected over water & Fick's Law

Jan 11, 2014 · Replies 7 · Jan 14, 2014

Replies: 7

Views: 6K

Substance is in equilibrium between its vapour and liquid

Jan 11, 2014 · Replies 2 · Jan 12, 2014

Replies: 2

Views: 3K

Electrochemical reduction of Hydrogen forms hydride?

Jan 11, 2014 · Replies 5 · Jan 12, 2014

Replies: 5

Views: 2K

What is the unit cell and coordinates for wurtzite crystal structure?

Dec 19, 2013 · Replies 1 · Jan 10, 2014

Replies: 1

Views: 3K

What happens with fats after exercise?

Jan 9, 2014 · Replies 3 · Jan 10, 2014

Replies: 3

Views: 2K

What Factors Influence Vapour Pressure and Molecular Escape into the Gas Phase?

Jan 8, 2014 · Replies 9 · Jan 9, 2014

Replies: 9

Views: 4K

WHy are ionic bonds intramolecular forces?

Dec 31, 2013 · Replies 2 · Jan 9, 2014

Replies: 2

Views: 3K

Mass of Light Bulb Change From Adding Ideal Gas

Jan 8, 2014 · Replies 4 · Jan 9, 2014

Replies: 4

Views: 2K

Explaining the 2 in Δt = 2L/vx in Kinetic Theory

Jan 8, 2014 · Replies 1 · Jan 8, 2014

Replies: 1

Views: 2K

Side chains numeration of proteins (example Cytochrome C)

Jan 7, 2014 · Replies 1 · Jan 7, 2014

Replies: 1

Views: 2K

Problem in determining the moisture content

Jan 6, 2014 · Replies 1 · Jan 7, 2014

Replies: 1

Views: 2K

E=mc^2 states mass and energy are interchangeable but ?

Jan 6, 2014 · Replies 5 · Jan 6, 2014

Replies: 5

Views: 2K

Software to find similarity of two molecules

Jan 5, 2014 · Replies 4 · Jan 5, 2014

Replies: 4

Views: 2K

Removing impurities via recrystallization

Jan 3, 2014 · Replies 3 · Jan 5, 2014

Replies: 3

Views: 4K

How to ship catalytic material into the US

Jan 4, 2014 · Replies 3 · Jan 4, 2014

Replies: 3

Views: 1K

Effects of Pressure on Water: Explained

Jan 1, 2014 · Replies 2 · Jan 1, 2014

Replies: 2

Views: 2K

How to Determine the Wavelength to Cleave O-H Bonds in Water?

Dec 30, 2013 · Replies 4 · Dec 31, 2013

Replies: 4

Views: 3K

Corrosion Vs Oxidation: Differences?

Dec 31, 2013 · Replies 1 · Dec 31, 2013

Replies: 1

Views: 3K

Debye-Hückel Rule: Relaxation Effects in Electric Fields

Dec 4, 2013 · Replies 4 · Dec 31, 2013

Replies: 4

Views: 3K

Can Ferromagnetic Objects Be Decomposed Using Magnetism?

Dec 27, 2013 · Replies 9 · Dec 30, 2013

Replies: 9

Views: 2K

Using a Catalyst With Fuel Cells: Benefits and Challenges

Dec 30, 2013 · Replies 3 · Dec 30, 2013

Replies: 3

Views: 3K

Max Conjugate Base: Find pH w/ Sum of pKa's

Dec 26, 2013 · Replies 6 · Dec 30, 2013

Replies: 6

Views: 3K

Resonance Structures Chemistry: What is Potential Energy?

Dec 29, 2013 · Replies 3 · Dec 29, 2013

Replies: 3

Views: 3K

Is there a safer and simpler method for separating sodium from table salt?

Dec 28, 2013 · Replies 2 · Dec 29, 2013

Replies: 2

Views: 3K

How to extract bubbles gas from gel(Super Absorbent Polymer)

Dec 21, 2013 · Replies 3 · Dec 21, 2013

Replies: 3

Views: 3K

How do you determine the pKa values of novel bases?

Dec 21, 2013 · Replies 1 · Dec 21, 2013

Replies: 1

Views: 3K

Hydrolysis of salts of weak acid-weak base

Dec 21, 2013 · Replies 1 · Dec 21, 2013

Replies: 1

Views: 5K

How to reduce volume while retaining alcohol.

Dec 19, 2013 · Replies 2 · Dec 20, 2013

Replies: 2

Views: 2K

Are Eggs Liquid or Solid and Why Do They Change State When Heated?

Dec 20, 2013 · Replies 3 · Dec 20, 2013

Replies: 3

Views: 6K

Need advice on extracting carboxylic acids from an NaOH Mixture

Dec 18, 2013 · Replies 5 · Dec 20, 2013

Replies: 5

Views: 3K

Can Magnetic Fields Purify Water for Reuse in a CO2 Scrubber?

Dec 19, 2013 · Replies 5 · Dec 19, 2013

Replies: 5

Views: 8K

What type of chemical reaction does not have oxdiztion and reduction

Dec 19, 2013 · Replies 1 · Dec 19, 2013

Replies: 1

Views: 2K

Why does each element only react with certain elements?

Dec 18, 2013 · Replies 3 · Dec 18, 2013

Replies: 3

Views: 4K

Detecting the THC molecule in room air

Dec 17, 2013 · Replies 3 · Dec 17, 2013

Replies: 3

Views: 3K

What are these pericyclic reactions?

Dec 15, 2013 · Replies 1 · Dec 17, 2013

Replies: 1

Views: 2K

Fluorescence Excitation and Emission Spectra

Dec 16, 2013 · Replies 3 · Dec 16, 2013

Replies: 3

Views: 15K

One basic question - Hydrolize Water

Dec 14, 2013 · Replies 6 · Dec 15, 2013

Replies: 6

Views: 2K

Why Don't Redox Reactions in Water Occur as Expected?

Dec 12, 2013 · Replies 9 · Dec 15, 2013

Replies: 9

Views: 4K

Heisenberg's Uncertainty Principle

Dec 14, 2013 · Replies 6 · Dec 15, 2013

Replies: 6

Views: 3K

What are some nonreactive electrolyte solutions?

Dec 14, 2013 · Replies 1 · Dec 15, 2013

Replies: 1

Views: 3K

Would evaporation still take place?

Dec 10, 2013 · Replies 6 · Dec 14, 2013

Replies: 6

Views: 2K

Bonding in coordination complexes

Oct 29, 2013 · Replies 1 · Dec 14, 2013

Replies: 1

Views: 3K

Molecular Orbital Theory: Build MOs for Diatomic Molecules

Dec 12, 2013 · Replies 2 · Dec 12, 2013

Replies: 2

Views: 3K

Is the Strength of a Chemical Bond Determined by Ionic or Covalent Character?

Oct 22, 2012 · Replies 10 · Dec 12, 2013

Replies: 10

Views: 29K

How to Purify Methane from Biomass for Clean Burning?

Dec 11, 2013 · Replies 4 · Dec 12, 2013

Replies: 4

Views: 3K

Chloride test question (Mohr's method)

Dec 11, 2013 · Replies 2 · Dec 12, 2013

Replies: 2

Views: 2K

Electron Movement: Reasons for Revolution Around Atom

Oct 5, 2012 · Replies 5 · Dec 10, 2013

Replies: 5

Views: 3K

Why is the heat of formation defined?

Dec 9, 2013 · Replies 4 · Dec 9, 2013

Replies: 4

Views: 2K

PCl5 / SOCl2 and carboxylic acids

Nov 28, 2013 · Replies 1 · Dec 9, 2013

Replies: 1

Views: 8K

Why is equilibrium constant K a product of the concentrations?

Sep 23, 2013 · Replies 11 · Dec 9, 2013

Replies: 11

Views: 6K

Velocity changes with temperature?

Dec 6, 2013 · Replies 1 · Dec 6, 2013

Replies: 1

Views: 4K

Delocalization in metals and conjugated systems

Dec 2, 2013 · Replies 8 · Dec 5, 2013

Replies: 8

Views: 3K

What is the Wittig reaction mechanism?

Dec 4, 2013 · Replies 1 · Dec 4, 2013

Replies: 1

Views: 2K

Hydronium Treatment: H3O+ vs. H+ Equilibrium Constants

Dec 4, 2013 · Replies 1 · Dec 4, 2013

Replies: 1

Views: 3K

What is the structure of NC- ion, also known as isocyanide ion?

Dec 4, 2013 · Replies 1 · Dec 4, 2013

Replies: 1

Views: 4K

Photochemistry Experiment: Seeking Advice on UV-Light Apparatus

Dec 3, 2013 · Replies 2 · Dec 3, 2013

Replies: 2

Views: 2K

Why alkyl halides dont dissolve in water?

Dec 2, 2013 · Replies 1 · Dec 2, 2013

Replies: 1

Views: 3K

Iodine Clock H2O2/I-/H+ why buffer it?

Nov 30, 2013 · Replies 6 · Dec 2, 2013

Replies: 6

Views: 5K

Ionization of Zinc in galvanic cells

Dec 1, 2013 · Replies 3 · Dec 2, 2013

Replies: 3

Views: 2K

Isoelectric Point: Math, Buffers & Charge Balance

Nov 28, 2013 · Replies 12 · Dec 2, 2013

Replies: 12

Views: 4K

Ligand field theory and CuCl2 colors

Nov 28, 2013 · Replies 5 · Nov 28, 2013

Replies: 5

Views: 3K

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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