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What are the physical methods for the determination of reaction rate?
Wiki User
∙ 13y ago
There are two methods used primarily.
In the first method, the same reaction is repeated several times, but each time a different concentration of the reactants is used and the initial reaction rate is measured each time. However, it must be done in a logical way for this method to work. The simplest way to do it is to start with one ratio of the reactants. Let's assume we have two reactants, A and B. So we'll start with a concentration of 1 for A and 1 for B. Measure the initial rate. Then we'll double the concentration of A to 2, but keep B the same. If the rate doubles, the order of reactant A is one, but if the rate quadruples, the order is 2. Then we do the same thing for B. Keep A the same, but double B. Again, does it double or quadruple the rate? If you have three reactants you have do do more combinations like this to isolate each variable. Just make sure you change only one thing at a time so you can figure out individual effects. If you change everything at once, it's a mess!
The other way is to look at the reaction rate as a function of time. Here the reaction is only performed once, but the rate is monitored over time. Based on the predictions for different order reactions, the shape of the curve you plot when you graph the reaction rate versus time will be different for different order reactions. By the shape of the graph you plot, you can tell the reaction order in this way.
Wiki User
∙ 16y ago
Wiki User
∙ 6y ago
Signs of chemical reactions may be: - Gas release - Formation of a precipitate - Change of color - Change of odor - Change of pH - Change of aspect - Change of viscosity - Change of the temperature - Visible formation of new compounds - Change of the state of the matter - A violent reaction with explosion or fire - Bubbling - Emitting a sound - Emitting a light
Wiki User
∙ 13y agoIn this method we determine the rate of reaction physically.in this method we put the sample in machine and thus we determine the reaction rate.it is very easy method.
Wiki User
∙ 11y agoIf the reaction is endo or exothermic, a differential scanning calorimeter can be used to monitor and record the rate of the reaction.
Wiki User
∙ 11y agohi i'm liam ramsey
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What measures of how fast reaction occurs?
The measure is the rate of reaction.
Generally How does increasing the concentration affect the rate of a chemical or physical?
Generally in a way that's far too complicated to give a single answer for.
What happens to the reaction rate when a catalyst is used in a chemical reaction?
With a catalyst the reaction rate is higher.
What is a property of a reaction that has reached equilibrium?
the rate of the forward reaction is greater than the rate of the reverse reaction.
What is a reaction in a balancing equation?
When an equation is balanced, the rate of the forward reaction equals the rate of the reverse reaction.
What are the methods for the determination of rate of reaction?
In this method we determine the rate of reaction physically.in this method we put the sample in machine and thus we determine the reaction rate.it is very easy method.
How do you determine the rate of a reaction?
There are several physical and chemical methods depending upon nature of reactants and products.
What is definition of kinetics?
The branch of physical chemistry, which deals with the rate of reaction and the factors upon which rate of reaction depends is called chemical kinetics.
What methods can you use to increase the rate of a chemical reaction?
There are several ways that the rate of reaction may be increased. Some of the more common ways areincrease temperatureincrease surface area (grind or powder the reactants)use a catalystagitate/stir the reaction mixture
What measures of how fast reaction occurs?
The measure is the rate of reaction.
What is the speed at which a reaction occurs called?
The chemical term is reaction rate.
The reaction rate of melting ice can be increased by what 1 adding catalyst 2 increasing concentration of the reactant 3 increasing pressure on the reaction 4 none its physical?
adding a catalyst none its physical
What describes a reaction that reaches equilibrium?
The product and reactants reach a final, unchanging level.
What effect does the concentration of reactants have on the the rate of a reaction?
The effect of concentration of reactants on rate of reaction depends on the ORDER of the reaction. For many reactions, as the concentration of reactants increases, the rate of reaction increases. There are exceptions however, for example a zero order reaction where the rate of reaction does not change with a change in the concentration of a reactant.
Could heat increase the rate of reaction?
if reaction is exothermic then on heating rate of reaction wil be low,and if reaction is endothermic then rate of reaction wil be high on heating
Generally How does increasing the concentration affect the rate of a chemical or physical?
Generally in a way that's far too complicated to give a single answer for.
What is the rate of the of a reaction?
An expression relating the rate of a reaction to the rate constant and the concentrations of the reactants
