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As the temperature of HCl increases, the rate of reaction is expected to increase as the particles have more kinetic energy so there are more frequent collisions as well as a greater proportion of successful collisions between reacting particles.
Learn how to measure the rates of chemical reactions with BBC Bitesize GCSE Chemistry (WJEC).
- Example 1: Reaction Between Copper Sulfate and Magnesium
- Example 2: Reaction Between A Group 1 Metal and Water
- Example 3: Measurements from A Diagram
Let’s consider a displacement reaction between copper sulfate and magnesium, illustrated below. In the exam, you may be asked to describe what you observe in this reaction. Be careful not to give a really vague answer, like “it went colourless.” That’s not specific enough. What went colourless? What colour was it before? Did anything else happen? A...
Another common question in the exam is to describe the reaction between a Group 1 metal and water. Exam questions often ask what would be observed in this reaction. Answers normally accept two of the key observations: bubbles of (hydrogen) gas are produced/effervescence/fizzing; the metal floats on the water’s surface and moves around; the metal di...
In the exam, you may be required to take a measurement from a diagram of a practical experiment. For example, you might be asked to measure the amount of acid left in the burette at the end of a titration. In titration diagrams, there are two really important things to remember: 1. The measurement at the top of the burette (when it is full) is 0, w...
Aug 20, 2019 · In reporting experimental results two important issues are: 1) how close is the experimentally reported average to the true value and 2) how reproducible or closely grouped was the data used in determining the average? The first issue deals with the concept of accuracy while the second deals with precision.
Sep 23, 2021 · Peak and trough levels indicate drug levels in an individual’s body. A peak is the highest level of a medication in the blood, while a trough level indicates the lowest concentration. Troughs of medication concentration occur after the drug has been broken down and metabolized by the body.
- Peaks and troughs are the highest and lowest concentrations of a medication in an individual’s body. They are used to determine dosing intervals, o...
- The time to take peak levels depends on the route of administration. The peak level is taken about 15 to 30 minutes after intravenous injections or...
- Peaks and troughs are the highest and lowest concentrations, respectively, of a medication in an individual’s body. They are used to determine dosi...
Nov 24, 2020 · To ensure proper measurement in the chemistry lab, always use SI units to quantify and describe what you measure. Other important considerations for proper measurement include accuracy, precision and significant figures.
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Upon completion of the lab, you will move into a new phase of your lab experience. You now must now carefully evaluate your results with care and interpret them in a logical way. In this chapter, we will focus on the interpretation of the three most important types of results.
