System Monitor Gauge
System Monitor Gauge
Please tell me the correct answer with an explanation? (10 points + 5 stars for best answer) THANKS everyone?
Consider the following reaction: Zn (s) + 2 HCl (aq) ---> ZnCl2 (aq) + H2 (g) of the following tools could be used control the reaction rate in an open system? I. An assessment to measure the mass of Zn II every 15 seconds. A gauge for measuring the H2 gas product III. A pH meter to measure the acid is HCl used with a. I and II. B. I and III. C. II and III. D. I, II and III.
Q: If the system is closed (that is, for example, that hydrogen is captured in a bottle and the balance measures the weight of both the ball with the liquid and gas) can not use the scale, because mass is the same, it is only changing the "form", zinc chloride and hydrochloric acid or zinc and hydrogen. All the weight will remain the same. (Note that the rules of this automatically options A, B and D, which gives answer c). On the other hand, if hydrogen can escape from the system, the balance would register a slight change in weight due to the purging of hydrogen. II: The gauge can be used as the presence increasing H2 also increase the pressure in the gas tank is seized III: The pH meter can be used, because the consumption of HCl in the phase decreases acidity water, thereby providing a higher pH (remember that high pH values are more basic and more acidic low) Thus, according to the system, both answers are C and D. My choice would be c, because the balance can not save the correct small change in weight, and also measured every 15 seconds while the other two systems can be measured continuously. This applies to both open and closed systems. In addition, it is easier to obtain a sensitive indicator pressure (an indicator of the liquid column can still be done), instead of a delicate balance. Therefore, my choice is C. Hope this helps Hope this helps
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