The rate of disappearance of HCl was measured for the following reaction: CH3OH1aq2 + HCl1aq2¡CH3Cl1aq2 + H2O1l2 The following data were collected: Time (min) 3HCl 4 1M2 0.0 1.85 54.0 1.58 107.0 1.36 215.0 1.02 430.0 0.580 (a) Calculate the average rate of reaction, in M>s, for the time interval between each measurement.

검증된 단계별 안내

Identify the concentration of HCl at different time intervals. For example, at time 0.0 minutes, the concentration of HCl is 1.85 M, and at 54.0 minutes, it is 1.58 M.

Calculate the change in concentration of HCl (\(\Delta [HCl]\)) for each time interval by subtracting the final concentration from the initial concentration. For instance, between 0.0 and 54.0 minutes, \(\Delta [HCl] = 1.58 \text{ M} - 1.85 \text{ M}\).

Determine the change in time (\(\Delta t\)) for each interval by subtracting the initial time from the final time. For the first interval, \(\Delta t = 54.0 \text{ min} - 0.0 \text{ min}\).

Calculate the average rate of reaction for each interval using the formula: \(\text{Average Rate} = \frac{\Delta [HCl]}{\Delta t}\). Convert the time from minutes to seconds by multiplying by 60, as the rate should be expressed in M/s.

Repeat the calculations for each time interval to find the average rate of reaction for each.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

11m

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Reaction Rate

The reaction rate is a measure of how quickly reactants are converted into products in a chemical reaction. It is typically expressed as the change in concentration of a reactant or product per unit time, often in units of molarity per second (M/s). Understanding how to calculate the average rate of reaction over specific time intervals is crucial for analyzing kinetic data.

Average Rate Calculation

The average rate of a reaction over a time interval can be calculated by taking the change in concentration of a reactant or product and dividing it by the time interval. For example, if the concentration of HCl decreases from 1.85 M to 1.58 M over a certain time, the average rate can be calculated as the difference in concentration divided by the time elapsed. This method provides a straightforward way to quantify the speed of the reaction.

Concentration Units

Concentration is a measure of the amount of a substance in a given volume of solution, commonly expressed in molarity (M), which is moles of solute per liter of solution. In the context of reaction rates, understanding how to interpret and manipulate these units is essential for accurate calculations. Changes in concentration over time directly relate to the kinetics of the reaction being studied.