A student was asked to identify a sample of unknown hydrate. Student was provided with the following experimental data. 3.51 g sample of the hydrate when heated loses water completely and the mass of the residue was found to be 2.22 g. Student was provided with two reference compounds from which student needs to identify the unknown: Cu(NO3)2.3H20 and Cu(NO3)2.6H20. Answer the followings. a. Calculate percent water of hydration in the sample. (show your calculations) 3.51g 2.22g 1.29 [1.29g/3.51g] x 100 =36.75% 36.8 b. Identify the formula of the hydrate.
A student was asked to identify a sample of unknown hydrate. Student was provided with the following experimental data. 3.51 g sample of the hydrate when heated loses water completely and the mass of the residue was found to be 2.22 g. Student was provided with two reference compounds from which student needs to identify the unknown: Cu(NO3)2.3H20 and Cu(NO3)2.6H20. Answer the followings. a. Calculate percent water of hydration in the sample. (show your calculations) 3.51g 2.22g 1.29 [1.29g/3.51g] x 100 =36.75% 36.8 b. Identify the formula of the hydrate.
Introductory Chemistry: A Foundation
8th Edition
ISBN:9781285199030
Author:Steven S. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Donald J. DeCoste
Chapter8: Chemical Composition
Section: Chapter Questions
Problem 94AP
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The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
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When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
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Answer B and c
![2. A student was asked to identify a sample of unknown hydrate. Student was provided with
the following experimental data.
3.51 g sample of the hydrate when heated loses water completely and the mass of the
residue was found to be 2.22 g.
Student was provided with two reference compounds from which student needs to identify
the unknown: Cu(NO3)2. 3H2O and Cu(NO3)2. 6H2O. Answer the followings.
a. Calculate percent water of hydration in the sample. (show your calculations)
3.51g 2.22g 1.29 [1.29g/3.51g] x 100 =36.75% 36.8
b. Identify the formula of the hydrate.
51°F](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F72e4817c-fc9d-4e3f-a33a-5ae87bf061ce%2F8d694d6f-b816-426d-bb71-b135a931ed24%2F1442toh_processed.jpeg&w=3840&q=75)
Transcribed Image Text:2. A student was asked to identify a sample of unknown hydrate. Student was provided with
the following experimental data.
3.51 g sample of the hydrate when heated loses water completely and the mass of the
residue was found to be 2.22 g.
Student was provided with two reference compounds from which student needs to identify
the unknown: Cu(NO3)2. 3H2O and Cu(NO3)2. 6H2O. Answer the followings.
a. Calculate percent water of hydration in the sample. (show your calculations)
3.51g 2.22g 1.29 [1.29g/3.51g] x 100 =36.75% 36.8
b. Identify the formula of the hydrate.
51°F
Transcribed Image Text:c. Calculate the percent error in the number of water molecules. (if-any)
d. List some possible source of error (if any).
rch
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