Quantitative Chemical Analysis Exam Questions Answered Correctly (Graded A+)
0 view 0 purchase
Course
Quantitative Chemical Analysis
Institution
Quantitative Chemical Analysis
Quantitative Chemical Analysis Exam Questions Answered Correctly (Graded A+)
Branch of analytical chemistry that deals with determination of an unknown chemical species in a sample - Answers Qualitative analysis
Which branch of analytical chemistry deals with the determination of the amount of th...
Quantitative Chemical Analysis Exam Questions Answered Correctly (Graded A+)
Branch of analytical chemistry that deals with determination of an unknown chemical species in a
sample - Answers Qualitative analysis
Which branch of analytical chemistry deals with the determination of the amount of the unknown
chemical species in a sample - Answers Quantitative analysis
What are the SI units? - Answers Length- Meter
Mass- Kilogram
Time- Second
Temperature- Kelvin
Amount of Substance- Mole
Electric Current- Ampere
Luminous intensity- Candela
Plane angle- Radian
Solid angle- Steradian
Frequency- Hz
Force- N
In physico-chemical experiments (in which temperature as well as the volume of the
system may change), the most appropriate way of expressing concentration is through this unit: -
Answers Molality
Avogadro's number represents the number of particles present in this amount of a
The average of this type of error is zero - Answers Random error
This type of error cannot be eliminated - Answers Random error
A laboratory protocol requires a reaction to be carried out using methanol as the solvent.
A careless technician performed this reaction using hexane as the solvent. In this instance, this type of
error has occurred - Answers Gross error
Statistical methods are applied to improve data containing only this type of error - Answers Random
,Faulty calibration of an analytical instrument will cause this type of error: - Answers Systematic error
The variance of a sample is represented by this symbol - Answers s^2
A symmetrical bell-shaped curve represents this type of distribution: - Answers Gaussian
The maximum of the Gaussian distribution curve corresponds to this parameter of the
sample presented on the x-axis - Answers Mean
In Gaussian distribution, 95% of the data points are located within this span around the
true value - Answers ±2sigma
In order for experimental data to be meaningful, it must be accompanied by this
information - Answers Error involved
In replicate measurements, the closeness of the mean to the true value is represented by
this term - Answers Accuracy
Systematic error affects this in experimental measurements - Answers Accuracy
The true value of a population is estimated by this parameter - Answers confidence interval
This parameter is not a measure of precision: - Answers Mean
A clinical technician has determined the concentration of thiol in blood of a rheumatoid
arthritis patient in replicate measurements with the following results (in mM): 2.81, 4.06, 3.62, 3.56,
3.27, 3.46, and 3.76. The technician will have this many degrees of freedom in determining the
variance of these measurements - Answers Six ( n-1)
The confidence interval shows a range of values that includes this parameter of the
population with an ascribed degree of confidence - Answers Mean
In order to compare two means, one should perform this type of significance test: - Answers t-Test
In order to compare two variances, one should perform this type of significance test: - Answers F-Test
In a significance test, if the calculated value of the test parameter exceeds its critical
value, then one should do this with the null hypothesis - Answers Reject
When a null hypothesis is accepted, it signifies that the observed difference between the
, compared values is due to this - Answers Random variation
Which term describes the minimum detectable concentration of an
analytical method: - Answers Detection limit
An analysis involves several steps and operations which depend on: - Answers 1- Problem
2- Expertise
3- Apparatus
General steps in Chemical Analysis - Answers 1- Formulate question
2- Select method
3- Sampling
4- Sample preparation
5- Analysis
6- Interpretation
7- Conclusion
Yotta - Answers 10^24
Zetta - Answers 10^21
Exa - Answers 10^18
Peta - Answers 10^15
Tera - Answers 10^12
Giga - Answers 10^9
Mega - Answers 10^6
Kilo - Answers 10^3
Hecto - Answers 10^2
Deca - Answers 10^1
Deci - Answers 10^-1
Centi - Answers 10^-2
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller TutorJosh. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.99. You're not tied to anything after your purchase.
