Answered: Why should weighing or any other…

Why should weighing or any other measurement data, be recorded immediately in your laboratory manual and not on a scrap of paper?

General, Organic, and Biological Chemistry

7th Edition

ISBN:9781285853918

Author:H. Stephen Stoker

Publisher:H. Stephen Stoker

Chapter2: Measurements In Chemistry

Section: Chapter Questions

Problem 2.2EP: List the more common types of measurements made in chemical laboratories.

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Similar questions

If you have multiple analytical balances to use during a lab, why do you think it is important to use the same analytical balance for repeated weighing?
What are the similarities in random error and systematic error? In analytical method and graphical method?
What are the possible sources of error in weighing.
List the more common types of measurements made in chemical laboratories.
1) Describe at least three systematic errors that might occur while weighing a solid on an analytical balance. 2) Describe at least three ways in which a systematic error might occur while using a pipet to transfer a known volume of liquid.
What is the smallest mass that we can measure on an analytical balance that has a tolerance of ±0.1 mg, if the relative error must be less than 0.1%?
Which of the following is not the general step in the chemical analysis? a. sampling and sample storage b. selecting method c. calibration and measurement d. makes a hypothesis e. calculating results
part 1 Which of the following is a best practice in weighing solid samples? Use weighing paper, a watch glass, a beaker, or some other container to measure mass of your solid samples. Do not return the mass settings to zero mark; let the next user tare it for you. Place chemicals directly on the balance pan. For different trials of an experiment, use multiple balances for your measurements
In this experiment the mass of NaCl was measured indirectly only. Desgin an experiment procedure that would allow the mass of NaCl to be measured directly.
use the attached charts to answer the following: If the manufacturer of the vinegar used in the experiment stated that the vinegar contained 5.0% acetic acid, what would the percent error between your result and the manufacturer’s statement be? Show your work.
In an experiment a student used a 50 mL volumetric flask to prepare her copper solution but in calculations she used 100 mL as the sample volume. What effect will this error have on the final result? Will the calculated result be high of low?
In a gravimetric determination of lead content in brass, there is a constant loss by solubility of 1.55 mg of lead. A sample contains 7.86% by mass lead, and a 0.3514-g sample is used for the analytical determination using the gravimetric method. Calculate the % relative error. *Watch the units. **Provide your answer to two decimal places and without units. Avoid using scientific notation.