INTRODUCTORY CHEMISTRY-W/MOD.MASTERING.
6th Edition
ISBN: 9780134809922
Author: Tro
Publisher: PEARSON
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Chapter 1, Problem 24QGW
How curious are you? How good are your quantitative skills? How hard are you willing to work to succeed in chemistry? Answer these questions individually on a scale of 1 (= not at all) To 5 (= very), then share your answers with your group. Report the group average for each question.
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What are replicates in Analytical Chemistry?
O The component of a sample that repeats over different assays.
Similar assays done to different samples
A sample that contains exactly the same amount of analytes than the original sample
similar samples that are analyzed at the same time and in the same way
Acetic acid percentages in five vinegar samples were 4.98, 4.86, 4.97, 4.99. 5.08, 5.11, 4.97, 5.32 and 4.89. Could we reject any of these values with 95% confidence?
Q critical =
experimental Q =
Therefore (yes or no) the suspicious data can be rejected (write the value of the data that can be deleted, example 5.08).
1. You are working with a colleague to measure the carbonate chemistry of a set of
water samples. Unfortunately your colleague is a bit sloppy, and when you look at the
data, you realize there must have been some errors in the measurements. Blank cells
in the table below mean your colleague didn't collect data for that species in that
sample. For each sample (#1-6), EITHER explain why at least some measurements for
that sample must be in error OR fill in the missing data with reasonable values. (Note:
you can assume the precision of the measurements is ±1mM, so inconsistencies below
that level do not necessarily indicate errors.)
Sample
pH
[H2CO3*] (MM) [HCO3] (mM) [CO3²-] (MM)
Total C (mM)
1
12.0
195
199
2
3.1
155
520
3
1000
100
1101
4
7.4
317
317
50
CO
248
248
1675
6
8.3
97
402
Chapter 1 Solutions
INTRODUCTORY CHEMISTRY-W/MOD.MASTERING.
Ch. 1 - Where can you find chemicals? a. In a hardware...Ch. 1 - Q2. Which statement best defines chemistry?
a. The...Ch. 1 - According to the scientific method, what is a law?...Ch. 1 - Q4. Which statement is an example of an...Ch. 1 - The graph below shows the area of a circle as a...Ch. 1 - Which characteristic is necessary for success in...Ch. 1 - Why does soda fizz?Ch. 1 - 2. What are chemicals? Give some examples.
Ch. 1 - What do chemists try to do? How do they understand...Ch. 1 - 4. What is meant by the statement, “Matter does...
Ch. 1 - Define chemistry.Ch. 1 - How is chemistry connected to everyday life? How...Ch. 1 - 7. Explain the scientific method.
Ch. 1 - Cite an example from this chapter of the...Ch. 1 - What is the difference between a law and a theory?Ch. 1 - 10. What is the difference between a hypothesis...Ch. 1 - What is wrong with the statement, It is just a...Ch. 1 - What is the law of conservation of mass, and who...Ch. 1 - What is the atomic theory, and who formulated it?Ch. 1 - Prob. 14ECh. 1 - Classify each statement as an observation, a law,...Ch. 1 - 16. Classify each statement as an observation, a...Ch. 1 - 17. A student prepares several samples of the same...Ch. 1 - A student measures the volume of a gas sample at...Ch. 1 - A chemist in an imaginary universe does an...Ch. 1 - 20. A chemist decomposes several samples of water...Ch. 1 - 21. The manufacturer of a particular brand of...Ch. 1 - Prob. 22QGWCh. 1 - 23. In your own words, provide a brief definition...Ch. 1 - 24. How curious are you? How good are your...Ch. 1 - 25. The graph displays world population over time....
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