Question

ould you help me with all three, please 8) If the solubility limit of sodium acetate (Molar mass-82 g/mol) at room temp is 76 grams per 100 grams of water, would a solution where 355 grams of sodium acetate is dissolved in 465 mi of water be considered supersaturated7 Show all your work, and asume 1 mi water-1gram 9) if the s Am isotope emits an alpha particle, what would be the atomic namber of the 243 resulting daughter atom? 10) Explain how a nuclear powerplant works and give at leas: 3 isotopes that can go through fission

Answer 1

8) Solubility limit of a substance at a particular temperature is it's saturation concentration at that temperature.

Saturation concentration of a substance is the maximum amount of that substance that can be dissolved in a specific volume of the solvent at the specified temperature and pressure.

The solubility limit of sodium acetate is given as 76 grams in 100 grams of water =, i.e 76 grams in 100 ml of water( since the density of water is 1 gm/ml at room temperature)

therefore saturation concentration of e=sodium acetate at 25^oC is 0.76g/ml .

Thus, maximum amount of sodium acetate that can be dissolved in 465 ml of water = 0.76 g/ml x 465 ml = 353.4 grams.

when 355 grams of sodium acetate is dissolved in 400 ml of water, the solution becomes supersaturated because the solubility limit is 353.4 grams in 400 ml).

9) An alpha decay is a type of radioactive decay in which the parent atom emits an alpha particle ( $He^{4}_{2}$ ) and the parent atom converts into another atom with an atomic number which is 2 less than that of the parent atom and mass number which is 4 less than that of the parent atom.

$X^{A}_{Z} \rightarrow Y^{A-4}_{Z-2} + He^{4}_{_{2}}$

243

The resulting daughter atom when undergoes an alpha decay is an atom with an atomic number hich is 2 less than 95, i.e neptunium( Z=93)

Am2

10.

A nuclear power plant is a non conventional energy source which uses the energy produced from nuclear fission to generate power. The most common fuel used in a nuclear reactor is uranium.When a Uranium-235 atom is hit with a neutron, it turns into Uranium-236 which is highly unstable, uranium-236 splits into barium and krypton releasing a huge amount of energy and also producing additional neutrons which can hit other uranium-235 atoms, thus producing a chain reaction and releasing a very large amount of energy.

The following elements can undergo nuclear fission-

i) Uranium-235

ii) Plutonium-239

iii) Thorium -232