A 0.1860 g rock sample containing an unknown amount of Ca was dissolved in HCI and diluted to 100.0 mL. Aliquots of 5.00 mL from this solution were added to different volumes of a 2.08 µg/ml. Ca standard solution and diluted to 200.0 mL. The emission intensity of these solutions was measured using atomic emission spectroscopy. The results are shown in the table. Unknown volume (mL) Standard volume (mL) Final volume (mL) Emission Intensity 200.0 200.0 200.0 200.0 200.0 5.00 227.0 5.00 413.0 5.00 637.0 5.00 831.0 5.00 1021.0 Find the weight percent of Ca in the rock sample and its uncertainty using the method of standard additions. weight percent: 8.27 x10-5 Incorrect 0.00 5.00 10.00 15.00 20.00 % Ca .03 Incorrect

A 0.1860 g rock sample containing an unknown amount of Ca was dissolved in HCI and diluted to 100.0 mL. Aliquots of 5.00 mL from this solution were added to different volumes of a 2.08 µg/ml. Ca standard solution and diluted to 200.0 mL. The emission intensity of these solutions was measured using atomic emission spectroscopy. The results are shown in the table. Unknown volume (mL) Standard volume (mL) Final volume (mL) Emission Intensity 200.0 200.0 200.0 200.0 200.0 5.00 227.0 5.00 413.0 5.00 637.0 5.00 831.0 5.00 1021.0 Find the weight percent of Ca in the rock sample and its uncertainty using the method of standard additions. weight percent: 8.27 x10-5 Incorrect 0.00 5.00 10.00 15.00 20.00 % Ca .03 Incorrect

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Related questions

Q: Determine the energy of 1.30 mol of photons for each of the following kinds of light. (Assume three…

A: To determine the energy we need to use the below formula, Energy(E) =no.of moles×NA×hcλ where, NA-…

Q: Which of these transitions do you expect to release the lowest energy photon? I II III

A: Energy of each energy level ( orbit ) is given by formula, En = - 13.6 / n2 ( for hydrogen )…

Q: If the plant produces 1.6 *106 kg of Cl2 daily estimate the quanties of NaOH produced. Answer in kg…

A: The number moles of Chlorine is calculated as,

Q: A chemical substance has the emission spectrum shown below. Rank the emitted radiation in order of…

A: We know, wavelength and Energy are inversely proportional. The lower the wavelength, the Higher the…

Q: Calculate the frequency of an X-Ray given that the wavelength is 5.0 nanometers. (Hint: 1 meter =…

A: Given, Wavelength = 5.0nm.

Q: A solution has [OH¯] = 4.0 × 10-. What is the value of [H*] for the solution?

A: Given :- [OH-] = 4.0 × 10-8 To calculate :- [H+]

Q: The positron has charge +e and mass equal to the electron mass. Calculate in electronvolts the…

A: Here we have Bohr's Energy Formula of nth electron, Energy of the electron in nth orbit, En

Q: What is the answer to 32

A: The atom is attracting shared pair electron

Q: Determine the number of valence electrons for each of the atoms. Enter each answer as a numeral. For…

A: Valence electron are that electron which is present in outer most shell and participate in bonding

Q: Using your knowledge of the absorption and emission processes, why are only specific colors absorbed…

A: The electrons in an atom or molecule can only occupy certain allowed energy levels. When an electron…

Q: What is the frequency of radiation whose wavelength is 319 nm?

A: Given: Wavelength = 319 nm c = 2.998 x 108 m/s. h = 6.63 x 10-34 J-s. To calculate :- frequency of…

Q: A sodium flame has a characteristic yellow color due to emissions of wavelength 566 nm. What is the…

A: Given that wavelength λ=566 nm =566×10-9m Energy of the photon can be find using the relation,…

Q: What is the wavelength of the indicated transition in a hydrogen atom (in nm) and does this process…

A: The correct option is-434nm, absorption

Q: Which of the following explain(s) how the reaction of carbon dioxide with water helps contribute to…

A: The Bohr effect is a phenomenon that describes the relationship between the partial pressure of…

Q: A 503 g portion of soup is heated in a microwave oven from 25.0°C to 90.0°C, using radiation with a…

A: Number of photons can be calculated from the energy of one photon and the total energy required for…

Q: Rank the elements by effective nuclear charge, Zeff, for a valence electron. Highest Zeff Lowest…

A: Zeff The effective nuclear charge is the net positive charge experienced by valence electrons.…

Q: To resolve an object in an electron microscope, the wavelength of the electrons must be close to the…

A: Answer:Here:

Q: The artificial element 114 (flervium) was created in in Russia in 1998. It has an atomic number of…

A: The distribution of electrons into various shells, subshells and orbitals of an atom is termed as…

Q: What is the energy of the radiation emitted when an electron in a hydrogen drops from an energy…

Q: A 0.817 nm wavelength X-ray photon strikes the surface of a metal. An electron emitted from the…

A: we have to calculate the binding energy of photon

Q: Data for the photoelectric effect of silver are given in the table. Frequency of incident radiation…

A: The multiplication of Planck's constant and frequency of incident radiation is equal to the sum of…

Q: In Einstein's photoelectric experiment, the kinetic energy (K.E.) of an electron displaced from a…

Q: • Part A Alpha particles (charge q = +2e, mass m 6.6 x 10-2 kg) move at 1.4x106 m/s What magnetic…

A: Given :

Q: 1. Calculate the velocity (in m/s) of an object with mass of 9.109 x 10-31 kg a wavelength of 540.…

Q: Explain the diagram

A: We have to elaborate the diagram.

Q: Using these data, find the experimentally determined value of Planck's constant, ℎh , and the…

A: The value of plancks constant h = 6.63 x 10-34 J sAverage value of frequency = 3x1015 /sAverage…

Q: Rank the following photons in terms of decreasing energy. IR ( = 6.5 1013 s-1) micro ( = 9.8 1011…

Q: The double bond between oxygen and carbon absorbs radiation that has a frequency of 6x10 13 s -1…

Q: Use the electron arrangement interactive to determine the order in which the orbitals are filled.…

A: Since you have posted multiple questions, we will provide the solution only to the first question as…

Q: When light is shined on a thin sheet of metal, electrons are released with a kinetic energy of 5.76…

A: Kinetic energy of electrons will be equal to the energy per photon minus the binding energy . Given…

Concept explainers

Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.

Question

A 0.1860 g rock sample containing an unknown amount of Ca was dissolved in HCI and diluted to 100.0 mL. Aliquots of
5.00 mL from this solution were added to different volumes of a 2.08 µg/mL. Ca standard solution and diluted to 200.0 mL. The
emission intensity of these solutions was measured using atomic emission spectroscopy. The results are shown in the table.
Unknown volume (mL) Standard volume (mL) Final volume (mL) Emission Intensity
0.00
200.0
5.00
200.0
10.00
200.0
15.00
200.0
20.00
200.0
Find the weight percent of Ca in the rock sample and its uncertainty using the method of standard additions.
weight percent:
5.00
5.00
5.00
5.00
5.00
8.27 x10-5
Incorrect
% Ca
.03
Incorrect
227.0
413.0
637.0
831.01
1021.0

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step 5

Step 6

Trending now

This is a popular solution!

Step by step

Solved in 6 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

21
The binding energy (work function) of titanium is 4.20 x 10-18 J per electron and you shine light that has a frequency of 7.85 x 10 ¹5 Hz. If 125 photons are absorbed by the Ti metal, then_ electrons should be ejected and each should have a Kinetic Energy of 154, Zero Joules O 125, 1.00 x 10-18 J Zero, 4.20 x 10-18 J O 154, 1.00 x 10-18 J O 125, Zero Joules
Einstein's work on the photoelectric effect validated and made extensive use of which of the following equations? A/ Ek=1/2 mv^2 B/ E=hv C/E=mc^2 D/^=h/mv E/ v=c/^
2. The data in the table show the amount of a 500 g sample of sodium-24 over time. Time (h) Na-24 (g) Time (h) Na-24 (g) 0 500 55 397 60 315 65 250 70 198 75 5 10 15 20 25 30 35 40 45 50 158 125 99 79 63 50 80 85 90 95 100 39 31 25 20 16 12 10 8 6 5 Make a graph of the data (remember to label all axes and title the graph). What is the half-life of sodium-24? Explain how you determined your answer. Sodium-24 decays by beta emission. Write a nuclear equation that shows the decay of sodium-24 and its products.
Chemistry - $2 - MI / Electromagnetic Radiation / Lesson 173 1. What is the frequency of a wave? O how many times a wave is repeated during a certain interval of time O the amount of time it takes from one crest or trough to travel one second the time it takes to pass by another object O the length of the wave from crest to crest or from trough to trough
Cobalt-60 is a radioactive isotope used to treat cancer. A gamma ray emitted by an atom of this isotope has an energy of 1.33 MeV (1 MeV = 1.602E-13 J). What is the frequency (in Hz) and the wavelength (in m) of this gamma ray? Show your work (converting the energy in MeV to J first).
(please type answer no write by hend)
Paylben
Fast pls solve this question correctly in 5 min pls I will give u like for sure
Hydrogen Spectrum (16 pts) Table 2. Calculated Emission Spectrum of Hydrogen. Determine the expected wavelengths of the emission spectrum for hydrogen. Report six sig figs. nf ni Wavelength (nm) 1 2 1 3 34 21 2 3 4 45 1 2 5 3 5 4 5 1 6 234 6 6 5 6 6 ectrum for Hydrogen. Indicate the color, intensity, and scal for hydrogen. State the corrected wavelengths bas The known/expected wavelengths a the energy levels; the visi gen visible