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Is The rate of a reaction is the change in concentration per unit?
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What is rate of reaction measured in?
Change in concentration of a substrate per second. This is the unit: (ΔMoles/dm^3) / s
What do you mean by specific reaction rate of a reaction?
The rate constant include all parameters ((but not concentration) affecting the rate of a chemical reaction.The expression "specific reaction rate" is used when the molar concentration of reactants is a unit.
What is the unit of first order reaction?
A zero-order reaction is a reaction that proceeds at a rate that is independent of reactant concentration. Typically with increasing or decreasing reactants
How in terms of collision theory how a decrease in concentration can change the rate of a precipitation reaction?
Decrease in conc. means decrease in no. of molecules per unit volume. Since, molecules or atoms will less in number, the no. of colliding particles will be less. This will lead to decreased precipitation
What are the factors that change reaction rates?
An important fact to remember is that for a reaction to occur the reactants' particles must:collidecollide with enough energy to break/form bondsSurface area of reactants - the larger the surface area the more successful collisions between reactants there are.Temperature - the higher the temperature the more kinetic energy the reactants have and the faster they move meaning they will collide more often (faster) and there will be more energy so there will be more successfulcollisions because the activation energy needed to break/form bonds between molecules is available.Concentration - the more concentrated the reactants are the more particles per unit volume so the collision rate between reactants increases and there is an increase in successful collision rate and the rate of reaction increases.Catalysts - are substances that speed up chemical reactions but remain chemically unchanged. They allow the reaction to occur with a lower activation energy meaning more particles will have energy equal or greater than this activation energy, meaning there will be more successful collisions between particles and the rate increases.FOR GASES ONLY: Increasing pressure - this is the same as increasing concentration.
What is rate of reaction measured in?
Change in concentration of a substrate per second. This is the unit: (ΔMoles/dm^3) / s
What do you mean by specific reaction rate of a reaction?
The rate constant include all parameters ((but not concentration) affecting the rate of a chemical reaction.The expression "specific reaction rate" is used when the molar concentration of reactants is a unit.
How factors affect rates of physical change?
-Reactant Concentration • The greater the concentration of reactants (the more particles per unit volume), the greater will be the number of effective collisions per unit time, and therefore, the reaction rate will generally increase. • For zero order reactions, however, the reaction rate is not dependent on the concentration of reactants. Increasing the reactant concentration will have no effect on the rate. -Temperature • The reaction rate will increase as the temperature of the system increases. As the temperature increases, the reactant molecules have more energy. They thus find it easier to climb the energy barrier to the reaction (the activation energy). -Solvent • The reaction rate will increase as the temperature of the system increases. As the temperature increases, the reactant molecules have more energy. They thus find it easier to climb the energy barrier to the reaction (the activation energy).
What is the unit of first order reaction?
A zero-order reaction is a reaction that proceeds at a rate that is independent of reactant concentration. Typically with increasing or decreasing reactants
How do you define Reaction rate?
Simple answer: When a reaction occur change in the concentrations of reactants or products per unit of time is called reaction rate . Scientific answer: The reaction rate (rate of reaction) or speed of reaction for a reactant or product in a particular reaction is intuitively defined as how fast or slow a reaction takes place. for example, the oxidative rusting of iron under the atmosphere is a slow reaction that can take many years, but combustion of cellulose in a fire is a reaction that takes place in fractions of a second.
How in terms of collision theory how a decrease in concentration can change the rate of a precipitation reaction?
Decrease in conc. means decrease in no. of molecules per unit volume. Since, molecules or atoms will less in number, the no. of colliding particles will be less. This will lead to decreased precipitation
What does a change in pH of one unit represent in terms of hydrogen ion concentration?
-1 pH unit = *10 concentration
What is the relationship between unit rates slopes and constant rate of change?
Unit rate, slope, and rate of change are different names for the same thing. Unit rates and slopes (if they are constant) are the same thing as a constant rate of change.
According to collision theory increasing the concentration of the reactants in a chemical reaction increases?
A.the rate of collisions between two particles.
What happens to the reaction rate as the reactants get used up in a reaction?
The rate of a reaction begins to decreases as reactant are used up
How do you measure the rate of a chemical reaction?
(Explanation): while you might think that it would be the number of collisions per second, it wouldn't be that because that wouldn't really describe the reaction rate, it would describe the collision rate, which might be different. therefore, a more specific answer would be the speed of the reaction.
What is The order of reaction for which unit of rate and rate constant is same?
In a zero order overall process, the rate and rate constant will be the same. (Reaction order is an exponent, and if that exponent is "0" then the value is "1" and will cancel out.)
