TA Date: Section Answer the following questions using information obtained from
ID: 1043930 • Letter: T
Question
TA Date: Section Answer the following questions using information obtained from lecture, the textbook the lab manual, or other reliable sources. The responses will be collected at the beginning of Pre-Lab Recitation and checked at the start of your lab section for credit. Failure to complete all answers may result in exclusion from participating in the lab 1. a. Write the balanced reaction of magnesium with hydrochloric acid to produce hydro- gen gas. The other products will remain as ions dissolved in water. Include phases Record the reaction also in your notebook for future use. b. Write the net ionic equation for the above reaction. Record the reaction also in your notebook for future use. 2. A student has chosen to generate 105 mL of H, in this experiment. a. How many moles of H, must be produced under SATP to generate this volume. (SATP is standard ambient temperature and pressure which is close to room conditions. This assumes 25°C, and 1.0 atm 1.01325 bar.) b. Why would generating 105 mL of H, not be a good choice for this experiment? 3. a. Using the ideal gas law (Eq.(1) and assuming SATP conditions calculate the volume of gas that would be produced by 1.00 gram of magnesium reacting with excess acid b. How many milliliters of 6 M hydrochloric acid are needed to react with all of the magnesium in (a)?Explanation / Answer
Ans 1 :
a) The balanced reaction of magnesium with hydrochloric acid is given as :
Mg (s) + 2HCl (aq) = MgCl2 (aq) + H2 (g)
b) The net ionic equation is given as :
Mg (s) + 2H+ (aq) = Mg2+ (aq) + H2 (g)
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