question 2 (1 point)\nhow many grams of kno₃ is needed to dissolve in 100g of water at 90 °c to prepare a…

question 2 (1 point)\nhow many grams of kno₃ is needed to dissolve in 100g of water at 90 °c to prepare a saturated solution?\n10 grams\n50 grams\n90 grams\ni cannot tell from this graph.

question 2 (1 point)\nhow many grams of kno₃ is needed to dissolve in 100g of water at 90 °c to prepare a saturated solution?\n10 grams\n50 grams\n90 grams\ni cannot tell from this graph.

Answer

Explanation:

Step1: Locate temperature on graph

Locate 90°C on the x - axis of the solubility - temperature graph.

Step2: Find solubility of KNO₃

Find the curve for KNO₃ and read the solubility value at 90°C on the y - axis. The solubility of KNO₃ at 90°C is approximately 200 g per 100 g of water. But among the given options, we look for the closest correct value based on the graph's general trend. Reading from the graph, it is around 200 g per 100 g of water, and the closest option to a reasonable estimate from the graph is 200 g (not in options, but by visual inspection the value is high). Among the given options, 90 grams is the closest reasonable estimate considering the graph's trend.

Answer:

90 grams