According to the image, the concentration of a solute on both sides of a semi-permeable membrane at 15 seconds will be equal (60/60), assuming that the equilibrium obtained at 10 seconds is maintained. If anything, however, the concentration on the acid side should be slightly higher than that on the base side because more H+ ions are passing through the membrane.
In practice, what do you expect the pH values to be at 15 and 30 seconds? What do you predict will happen if you don't remove the gizmo from the solution immediately?
At 15 seconds: The gizmo should be almost completely submerged in the solution. Since ion exchange only occurs when the gizmo is above water, there should be very little change in the concentration of the solution over time. Thus, the predicted pH value should remain close to 7.4.
At 30 seconds: The gizmo should now be out of the solution. Since no more ion exchange can occur, we should begin to see some drift in the pH value of the solution. We expect the pH to drop slightly due to the presence of excess acid in the solution. However, since there's still lots of base present, we shouldn't reach below 7.0 even after 30 seconds.
The half-life of the reaction grows as the starting concentration increases. For example, at a starting concentration of 10 millimolar and a rate constant of 0.01 per minute, the reaction will take about 3 hours to complete. But if the concentration is increased to 100 millimolars, then the reaction will only take about 30 minutes to complete.
In general, the half-life of a chemical reaction increases as the concentration of each reactant in the solution increases. This is because more molecules are available to participate in the reaction process. If one reactant is limited, then the half-life will decrease. For example, if the concentration of hydrogen peroxide is doubled while keeping that of methyl alcohol constant, then the half-life will be reduced from several hours to just under an hour because there's now less oxygen for each molecule of hydrogen peroxide to react with.
Chemical reactions are the driving force behind all life processes. Every time your body cells divide they use up their stored energy supplies (food) and make new cells.
The duration of the chemistry class is 2400 seconds. So, the chemistry class lasts 24000 milliseconds or 24 seconds.
(B) The enzyme gets saturated with substrate as the concentration of substrate increases. A high Km enzyme has a poor affinity for its substrate and requires a higher concentration of substrate to reach Vmax. As the concentration of substrate increases, the rate of reaction also increases.
Thus, at high concentrations of the substrate, the reaction slows down due to saturation of the enzyme.
In conclusion, KM values indicate the concentration of substrate required for the reaction to go half-way (i.e., to reach one-half of Vmax). Saturation of the enzyme at high concentrations of the substrate results in the reaction slowing down rather than continuing at a constant rate.
When the concentration of particles is higher in one place than in another, this is referred to as a concentration gradient. Particles will diffuse down a concentration gradient, from places of greater concentration to areas of lower concentration, until they are uniformly distributed in passive transport. Active transport would carry particles from place to place.
Concentration goes from high to low in equilibrium conditions. In an open system where particles are transported by diffusion or convection, they will reach equilibrium between input from any source and output to other parts of the system. This means that if there were no more inputs of particles into one area, then over time they would disappear, and there would be no more deposited there. If on the other hand, there were more outputs than inputs, then there would be more particles at each location, and it would not even out over time.
In equilibrium conditions, particles are deposited in areas of highest concentration. This is called "deposition toward equilibrium."
Concentration goes from high to low in active transport. Here, particles are carried from place to place by agents such as plants or animals. They are not released back into the environment at their point of origin, but instead accumulate at locations away from sources of contamination. Active transport results in particles being deposited in areas far removed from their original source.
Deposition toward equilibrium is dependent on the type of active transport involved.