Potassium chlorate is often used In oxygen generation systems, such as those in
ID: 1049712 • Letter: P
Question
Potassium chlorate is often used In oxygen generation systems, such as those in submarines. At high temperatures and in the presence of a catalyst (a substance that increases the rate of a catalyst (a substance that increases the rate of reaction without being consumed) potassium chlorate will decompose, with oxygen gas as one of the products. in this experiment, you will collect the oxygen from the decomposition of potassium chlorate and use it to calculate the mass percent of potassium chlorate in an unknown sample and the ideal gas constant R. The Ideal gas constant links the temperature, pressure, volume, and number of moles of an ideal The atoms of an ideal gas are infinitesimally small and experience negligible attractive forces. While oxygen is not an ideal gas, it is very close, so the ideal gas law does an excellent job of predicting its behavior. Pre-Lab Questions (to be answered in order in blue or black in in the lab notebook; due at the beginning of lab) Write the balanced chemical equation for the decomposition of potassium chlorate that you will be observing in this experiment. Include states of matter. What is the purpose of the manganese (IV) oxide that is present in the unknown sample? What do you think would happen without It? One potential source of error stems from the fact that heat is applied to the test tube to initiate the reaction. Discuss why this might cause an error, and whether your calculated R will be too high or too low. If the water level within the gas collection bottle is higher than the water level in the trough, is the pressure in the bottle higher or lower than the atmospheric pressure? Why is it important to remove the latex tubing from the gas collection bottle after the decomposition is complete? A student measures out 2.050 g of sample. After the reaction, the residue has a mass of 1.673 g. What is the percent by mass of potassium chlorate in the sample?Explanation / Answer
1.2 KClO3(s) ---------> 2 KCl(s) + 3 O2(g)
2.The decomposition of potassium chlorate, includes manganese(IV) oxide (MnO2) as a catalyst. A catalyst is a substance that causes an increase in the rate of a chemical reaction without being used up in the reaction. If the catalyst is not added, Will loss of oxygen be less extensive so, the solid product could be either KClO2 (potassium chlorite) or KClO (potassium hypochlorite). no oxygen is formed.
3. if heating is carried that will effect the system attached to mano meter and here R having same constant value, no need to decrese or increse.
4.pressure in the bottle incrse the water level and manometer is used to measure the pressre
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.