How many grams of KI can be dissolved in 300gH2O at 10C?
1 answer:
Answer:
- <em><u>About 408g of KI can be dissolved in 300 g of water at 10ºC.</u></em>
Explanation:
Look at the graph attached. It contains the solubility curves for severals solutes.
I have marked the solubility of KI at 10ºC: look the intersection of the vertical and horizontal dotted red lines: the corresponding solubility is read on the vertical axis. It is slightlly above the midpoint between 130 y 140 g per 100 g of water. Thus, you can approximate to 136 g / 100 g of water.
You need the number of grams dissolved in 300 g of water, thus mutilply by 300:
Thus, about 408g of KI can be dissolved in 300 g of water at 10ºC.
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Answer:
1. , remain the same.
2. ,increase.
3. , decrease.
Explanation:
Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.
This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.
Increase the pressure
If the pressure of the container is increased, the volume will decrease according to Boyle's Law. Now, according to the Le-Chatlier's principle, the equilibrium will shift in the direction where decrease in pressure is taking place.
1.
On increasing the pressure ,the equilibrium will shift in direction where decrease in pressure is taking place,so reaction will shift in no direction because number of gaseous moles are same on both sides. Hence no increase in number of moles of products.
2.
On increasing the pressure ,the equilibrium will shift in direction where decrease in pressure is taking place,so reaction will shift in forward direction because number of gaseous moles are less on product sides. Hence ,increase in number of moles of products.
3.
On increasing the pressure ,the equilibrium will shift in direction where decrease in pressure is taking place,so reaction will shift in backward direction because number of gaseous moles are less on reactant side both sides. Hence, decrease in number of moles of products.