Can a catalyst decrease the rate of reaction?
Catalyst alters the rate of a chemical reaction. Positive catalyst increases the rate of reaction. Negative catalyst decreases the rate of reaction. Catalyst does not change the quantity of products formed.
Does a catalyst increase or decrease the rate of reaction?
Catalysts can lower the activation energy and increase the reaction rate without being consumed in the reaction. Differences in the inherent structures of reactants can lead to differences in reaction rates.
What happens if too much catalyst is added?
If you use too much catalyst the mixture reacts too fast, and gets really hot and smokes, giving a really poor result.
Is the effect of a catalyst dependent on its concentration?
Sometimes the rate of reaction can depend on the concentration of all the reactants, and sometimes catalysts are present and help determine the speed of the reaction. Depending on the specific situation, changing the concentration of one reactant may have no effect.
Does a catalyst increase concentration?
Catalyst lower the activation energy requires by the particles of reactants to give a product, this result in formation of a product in a time less than the time taken for the reaction in the absence of a catalyst. By definition, the concentration of a catalyst does not change during a reaction.
Why does reaction rate change as concentration changes?
Concentration. If you increase the concentration of a reactant, there will be more of the chemical present. More reactant particles moving together allow more collisions to happen and so the reaction rate is increased. The higher the concentration of reactants, the faster the rate of a reaction will be.
What happens to a catalyst in a reaction?
A catalyst speeds up a chemical reaction, without being consumed by the reaction. It increases the reaction rate by lowering the activation energy for a reaction. Energy diagrams are useful to illustrate the effect of a catalyst on reaction rates. The catalyst would act in the same way for an exothermic reaction.
How does a catalyst make a reaction go faster?
A catalyst is a substance that can be added to a reaction to increase the reaction rate without getting consumed in the process. Catalysts typically speed up a reaction by reducing the activation energy or changing the reaction mechanism.
Are proteins that speed up chemical reactions in the body?
Enzymes are proteins that have a specific function. They speed up the rate of chemical reactions in a cell or outside a cell. Enzymes act as catalysts; they do not get consumed in the chemical reactions that they accelerate.
Why would a doctor recommend a high protein diet?
If you want to follow a high-protein diet, choose your protein wisely. Good choices include soy protein, beans, nuts, fish, skinless poultry, lean beef, pork and low-fat dairy products. Avoid processed meats. The quality of the carbohydrates (carbs) you eat is important too.
How many proteins should I eat a day?
The DRI (Dietary Reference Intake) is 0.36 grams of protein per pound (0.8 grams per kg) of body weight. This amounts to: 56 grams per day for the average sedentary man. 46 grams per day for the average sedentary woman.