Which salt shows the least solubility change when the temperature is increased from 0 to 100 c?
2 answers:
Correct answer: NaCl (sodium chloride)
Solubility of a salt is the amount of salt in grams that can be dissolved in 100 mL of water at a particular temperature. The solubility curve shows the amount of a particular salt that can be dissolved in 100 mL of water at different temperatures. For most of the salts, solubility increases as the temperature raises. But there are some ammonium salts, the solubility decreases as the temperature is increased. Sodium chloride is the salt whose solubility remains unaffected as the temperature increases from
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The reaction that the graph represents is A. Exothermic because Hrxn=-167 kJ
To calculate Hrxn we apply the following equation:
Looking at the graph, and at the result of the calculations, we can see that the enthalpy of the products is lower than the enthalpy of the reagents, because the sign is negative. That means that the reaction releases energy in the form of heat and that the reaction is exothermic.
Have a nice day!
The reaction that the graph represents is A. Exothermic because Hrxn=-167 kJ
To calculate Hrxn we apply the following equation:
Looking at the graph, and at the result of the calculations, we can see that the enthalpy of the products is lower than the enthalpy of the reagents, because the sign is negative. That means that the reaction releases energy in the form of heat and that the reaction is exothermic.
Have a nice day!