Here are some problems and their answers. I would appreciate if someone could please explain step...

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Chemistry

Here are some problems and their answers. I would appreciate ifsomeone could please explain step by step how to get these answers?I need to understand this concept.
The following questions refer to the equilibria: 2NaHCO3(s) â‡Œ Na2CO3(s) + H2O(g) + CO2(g) K(110Â°C)=0.68
1)If CO2(g) is added to the equilibrium mixture the partialpressure of H2O(g) will: answer: Decrease (how and why??)
2) If the volume of the container is decreased, the amount ingrams of sodium carbonate (Na2CO3(s)) will: Answer: decrease (Ithought volume only affects gases??)
3)The Î”H of the reaction was measured and determined to be -25kJ/mole of sodium bicarbonate (NaHCO3). If the reaction were run at150Â°C, a possible value for K could be: answer: 0.54
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This next question is not involved with the above.
4) What is the pH of the solution after 30 mL of 0.12 M HCl ismixed with 60 mL of 0.12M NaOH? Answer: . 12.60

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Answer Given reaction NaHCO3s Na2CO3s H2Og CO2g K110C 068 1If CO2g is added to the equilibrium mixture the partial pressure of H2Og will decrease because when we added CO2 gas the reaction gets reversed as per Le See Answer

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