How does Ph effect the chemical reactions of enzymes?
954479
The optimal pH for enzymes is 7 while the temperature is 37 degrees Celsius. When the pH & temperature deviate from this set point, the enzymes (tertiary proteins) will denature (unravel) and lose their active sites and can no longer carry out catalytic processes.\n\nEnzymes are often held in the body in inactive forms so that lower pH of the stomach (HCL) will not destroy its structure. A high pH will slow raise the level of activation energy, thus slowing down the catalytic process.
267166
B, its specific shape allows specific substrates to bind to the enzyme, thus catalyzing the reaction. If the enzyme DIDN'T have the specific shape, then the substrate would have to take a longer time to break their own bonds themselves.
698593
You are not giving us all of the info.\nYes the total or initial concentration of the acid is C=(8.345*10^-3)/0.05 = 0.1669 M\n\nFor a monoprotic acid Ka=[H+][A-]/{HA]\n[A-]=[H+]=10^-pH=10^-4\n[HA]=C-[H+]= 0.1669-0.0001= 0.1668\nso you have calcualted Ka correctly.\n\nKa depends on the nature of the acid and temperature (for small molecules whereas for bigger molecules like proteins it is also affected by the nature of the surrounding chemical groups).\n \nThus addition of base doesn't affect Ka, only the pH.\nIs the base monoprotic or not? If not, what's the valency? Is it strong or weak? If it's weak what's the Kb? Is it the conjugate base of the weak acid? Without these info we can't calculate the pH.
2805
Wow... that's a question that could be answered on many different levels, and you're optimistic as hell to think you can get a "real" answer here. Basically, an enzyme provides a micro-enviroment that is very conducive to the formation of an intermediate form that leads from the substrate to the product. Another way of saying this is that an enzyme, like any other catalyst, lowers the activation energy of a reaction.\n\nBut seriously, dude. You're asking for a course in biochemistry here. Try Stryer, or any other classic biochem textbook, for a more thorough answer.
882188
Enzymes have specificity which means they work on specific substrates. if you add ions to the substrate this will change the substrate slightly enough so that the enzyme will either not work on the substrate or will slow down.
42608
That all depends on the enzyme. It could denature a protein involved, making the enzyme useless, or it could speed up the enzyme's activity.
474830
Heat, availability of reactants, # of enzymes, other competing enzymes (if any).  These are a few.  Heat is one of the biggest as enzymes have specific temperatures at which they operate best.  At different temperatures they tend to slow or shut down completely.  Hope this helps.
698411
It would result in an increase of the pH of the aqueous solution.
1045054
Enzymes are substance specific.  That means that enzymes only act on their target substances, so an enzyme that works on proteins would not perform a chemical reaction when it is placed in lipids.\n\nAn enzyme is a molecule that catalyzes, or speeds up, a chemical reaction.  It does this by lowering the activation energy necessary to begin the reaction.\n\nEnzymes are essential to sustain life because most chemical reactions in biological cells would occur too slowly, or would lead to different products without enzymes.  The deletion of an enzyme would cause severe disease.\n\nEnzyme activity is affected by many external factors, such as temperature, pH, and amount of substrate.
388233
The enzyme is a catalyst that changes the activation energy requirements of the reaction.  In some cases, an enzyme can take reactants in a lower energy state, and convert them to products in a higher energy state.\n\nSince the laws of thermodynamics dictate that things generally want to be in a lower energy state, the products can, if they can overcome the activation energy, spontaneously revert to their original state as reactants.
596938
temperature doesn't affect pH (doesn't change acidity)
882738
The pH scale is logarhytmic- it goes up by powers of ten.\n\nFrom pH 2 to pH 1, there is 10 times the H+ concentration.\nFrom pH 3 to pH 1, there is 100 times the H+ concentration.\nAnd so on.\n\nTo answer your question, the pH will become more acidic by 3 points.
772757
Enzymes can only take (generally) very specific substrate.  A dissimilar substrate will usually not undergo any enzymatic alteration.  An enzyme's shape is what determines its function.  Altering the shape of the enzyme will usually prevent it from working on its substrate.
755733
Peroxidase is a catalyst...catalysts speed up a reaction.\n\nIncreasing surface area of a substrate increases the rate of a reaction. The enzyme can bind on more places of the substrate to catalyze the reaction. The only limiting factor is the amount of enzyme versus the amount of substrate.
102190
Some enzymes will be destroyed. But most will still work. Remember every enzyme has has an optimum envornment that it works at i.e. temperature and pH. So when it gets to 112 a lot of enzymes are not working at their best to sustain life.
1119448
You can find the carbonic acid and the phosphate buffers. Proteins also act as a buffer.\nThe pH of the saliva is near 7.\nThe pH in the stomach is about 3 because of HCl secretion by parietal cells.
362067
Heat always will affect the effeciency of enzyme activity. The body stays at around 34 C for good reasons, one being our enzymatic reactions have enough energy to conduct the reactions, but that it is not to hot to overcome the chemial structure of the enzyme.