1 answer

Please answer 1-6 and 8 DISCUSSION 1. Does the solubility of borax increase or decrease when...

Question:

please answer 1-6 and 8
DISCUSSION 1. Does the solubility of borax increase or decrease when the temperature is raised? Explain. 2. Is the forward re
DISCUSSION 1. Does the solubility of borax increase or decrease when the temperature is raised? Explain. 2. Is the forward reaction endothermic or exothermic? Justify your answer 3. Describe the mathematical changes in K, with increase in temperature and relate these numerical changes to the solubility of borax. Explain your anster 4. Calculate the sign and value of AS according to Eq. 12.7. Based on the bal- anced chemical equation for this reaction (Eq. 12.1), justify why the sign of the entropy change makes sense. 5. Calculate the sign and value of AH according to Eq. 12.7. Based on the bal- anced chemical equation for this reaction (Eq. 12.1), justify why the sign of the enthalpy change makes sense. 6. What do the values of AG indicate about the spontaneity of the reaction at dif. ferent temperatures? 7. Draw a molecular-level view of the supersaturated borax solution, being sure to represent the borax as Na B,0 . 10 HO, the sodium ions as Na', the tetraborate as B,0,?, and the solution molecules. 8. From your plot of Eq. 12.7, find the R' value and equation of the line by plotting ONLY TWO of the data points in K (1/T, and In K (2)/T, and finding the linear regression line. Then, using all three temperature data points, find the R? value and equation of the line by fitting to a linear regression line. How do your R? values compare and why? How do the equations compare? Which of these two methods provides more accurate data that fits your particular experiment?

Answers

Question 1

Answer

Solubility of borax in water increases with raise in temperature.

Borax is chemically know as sodium borate, sodium tetraborate or disodium tetraborate.it is an important boron compound.

Chemical formula of borax is Na2B4O7.10H2O

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