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This is a list of unsolved problems in chemistry. Problems in chemistry are considered unsolved when an expert in the field considers it unsolved or when several experts in the field disagree about a solution to a problem.
Job first published his method in 1928, while studying the associations of ions in solution. [1] By plotting the UV absorbance of a solution of Tl(NO 3 )/NH 3 against the mole fraction of Tl(NO 3 ) , he produced a graph which provided information about the equilibrium complexes present in solution.
Gas stoichiometry is the quantitative relationship (ratio) between reactants and products in a chemical reaction with reactions that produce gases. Gas stoichiometry applies when the gases produced are assumed to be ideal, and the temperature, pressure, and volume of the gases are all known. The ideal gas law is used for these calculations.
Since then experimentation has proven that Iron is a limiting factor for primary production. Iron-rich solution was added to 64 km 2 area which led to an increase in phytoplankton primary production. [21] As a result an extended Redfield ratio was developed to include this as part of this balance.
ITC is a quantitative technique that can determine the binding affinity (), reaction enthalpy (), and binding stoichiometry of the interaction between two or more molecules in solution. [15] This is achieved by measuring the enthalpies of a series of binding reactions caused by injections of a solution of one molecule to a reaction cell ...
A drop of indicator solution is added to the titration at the start; when the color changes the endpoint has been reached, this is an approximation of the equivalence point. Conductance The conductivity of a solution depends on the ions that are present in it. During many titrations, the conductivity changes significantly.
The very ambiguous terms percent solution and percentage solutions with no other qualifiers continue to occasionally be encountered. In thermal engineering, vapor quality is used for the mass fraction of vapor in the steam. In alloys, especially those of noble metals, the term fineness is used for the mass fraction of the noble metal in the alloy.
The oxygen reduction reaction is an essential reaction for aerobic organisms. Such organisms are powered by the heat of combustion of fuel (food) by O 2.Rather than combustion, organisms rely on elaborate sequences of electron-transfer reactions, often coupled to proton transfer.