States of Matter
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).
Chemical Reactions and Equations
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.
![2. Write the neutralization reaction between Ca(OH)2 and HCI. Include both the molecular
reaction, as well as the net ionic reaction.
3. A student titrate a saturated solution of Ca(OH)₂ with 0.0100 M HCl. A 10.00 mL sample of the
Ca(OH)2 solution required 20.04 mL of HCI to reach the endpoint of the titration.
a. Calculate the moles of HCI added in the titration, and then calculate the moles of OH-
present in the saturated solution.
b. Calculate [OH-] and [Ca²+] in the saturated solution.
C. Calculate Ksp for Ca(OH)2.
4. When peforming multiple trials at different temperatures, a student obtained the following
trendline equation. Calculte AH° and AS°.
y = 1737x - 18.31](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F23e9421d-bf81-4971-a581-67171cecee33%2F18d6538e-eeeb-4c80-b96f-8a1dfcb7e704%2Fhxxswa4_processed.jpeg&w=3840&q=75)
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