Equilibrium constant

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which has four binding sites for biotin or biotinylated derivatives with extraordinary affinity. Biotin can be chemically coupled to a binder molecule (e.g., a protein, DNA, hormone, etc.) without disturbing the interaction with its target molecule by a procedure called biotinylation. Avidin can then be exploited to “sandwich” between the biotinylated binder and a targeting molecule or probe. Avidin was also coupled with a functional moiety in some cases. Through the avidin-biotin system, we can…

The names imply the nature of the theories that have been and are currently being developed. One group of theories contends that the value of this energy must be constant, meaning the acceleration is ubiquitous and isotropic across the universe. Contrarily, scalar field theories deem that the values are anisotropic, or the acceleration is variant throughout the universe; this suggests the idea that there may be some…

This report will discuss multiple experiments regarding chemical equilibrium. Chemical equilibrium is when both reactants and products are both equal to each other. If one is not equal to each other, than the direction of shift will move to where equilibrium has been tampered with. Throughout all the labs, we observed that with different chemicals we have different directions of shift. From acids to bases, we see that direction of shift can vary which leads to different conclusions. We…

Ka, or the acid dissociation constant, gives a measure to which an acid dissociates in a solution. It also provides a measure of the strength of an acid. If the value of Ka is high, the said acid s largely dissociated, making the acid strong. However, when the value of Ka is small, the…

CH3COOH = mol NaOH). Using the molar mass of CH3COOH, the mass of acetic acid can be calculated, and compared to the mass of the overall vinegar solution (Thorne 86-87). These values can be compared to the theoretical values which state that the equilibrium constant of acetic acid is 1.8 x 10-5, and the percent mass of acetic acid in vinegar is 5%. Calculations/Discussion: Recorded data: Concentration of standardized NaOH Solution: 0.10 M Mass of Vinegar Used: 4.03 grams Volume of NaOH (mL)…

and B3 and their diluted versions, the following graphs can be drawn: Figure 2- A graph showing the relation between concentration of bromophenol blue in M and their absorbance for the acidic form of the molecule, showing the molar absorptivity constant of the molecule at wavelengths 440 nm and 590 nm. The reading with concentration 6 x 10-4 M at wavelength 440 nm was discarded as it is too off from the trend line that it is not following the trend at all. The deviated reading may be caused…

Because there are 5 things simultaneously present, 5 equations must be made. Two for the equilibrium constants, one mass balance equation for all A containing material and one for Na+, and 1 charge balancing equation as shown in the appendix. Since we are looking for the KA we need the equation in the form of KA = [H3O+][A-]/[HA]. Therefore the 5 equations…

The purpose of this lab is to determine the Ka of an indicator within an unknown solution. This can be determined because acid-base indicators are weak bases or acids, and when neutralized they change colors. The color change is measured by the light absorption spectra in the compound which can be used to calculate the concentration. This experiment measures the concentrations by the different pH values which allows the pKa and Ka to be determined. Through the experiment, and the recorded color…

charged ions are separated, by altering the pH of the solution; which shifts the equilibrium of the molecules. During this lab we will separate two compounds from one solute that will be formed by amalgamating a ‘slurry’ – provided by the instructor. Resin or cellulose is used to create a sound support unit in order maintain a constant positive or negative charge respectively, this will allow separation to occur when equilibrium is shifted during the reaction. The column will have a support unit…