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Help me plz!!!!

a. Calculate the solution concentration for each of the HCl samples. The first one has been done for you.

b. As the concentration of the HCl solution increased, did the speed of the reaction increase or decrease?

c. Therefore, as the concentration of a reactant increases, does the rate of the reaction increase or decrease?

d. Do your predictions previous to this investigation agree with your results?

e. Make a general rule about the effects of concentration of reactants on reaction rates.

User Smoyer
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1 Answer

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Final answer:

In chemistry, increasing the concentration of reactants generally leads to an increase in the reaction rate, especially for first-order reactions where the reaction rate is directly proportional to the concentration of one of the reactants. To find the order of reaction and the rate constant (k), experimental data must be analyzed and applied to the rate law.

Step-by-step explanation:

Understanding Reaction Rates and Concentration

When assessing the concentration of HCl solutions and how they affect the speed of a chemical reaction, we should consider the data provided from experiments. If an experiment shows that doubling the concentration of CH3CH2Cl doubles the reaction rate, it suggests a first-order reaction. Therefore, as the concentration increases, the rate of the reaction also increases. This is because a higher concentration of reactants means more particles are available to collide and react, thus increasing collision frequency and reaction rate.

To determine the order of a reaction, we compare the changes in initial reaction rates with changes in initial concentrations. A first-order reaction is characterized by the rate law, rate = k[Reactant], and the rate constant (k) can be calculated using data from a single experiment. For example, a rate constant for a first-order reaction could be determined from an experiment with a known initial concentration and an observed initial reaction rate.

Moving onto specific questions such as the order of the reactants NO and H₂, or calculating the remaining concentration of NO in an experiment, a careful analysis of experimental data and application of the rate law is required. The order of each reactant is determined by how changes in concentration affect the reaction rate, and the rate law is constructed based on these orders to help predict reaction speeds under various conditions.

In summary, increasing the concentration of a reactant typically leads to an increase in the rate of the reaction. The specific relationship between concentration and reaction rate will depend on the reaction order, which can be determined from experimental data and represented in the rate law equation.

User Geronimo
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