Swirl to mix. grams H 2 O = (96 x 1/32 x 2 x 18) grams H 2 O. grams H 2 O = 108 grams O 2 O. . This section describes how to use the stoichiometry of a reaction to answer questions like the following: How much oxygen is needed to ensure complete combustion of a given amount of isooctane? Heat the potassium chlorate sample slowly to avoid any splattering. Both the time of death and the chemical processes that take place after a person dies are of great interest to an investigator. To determine the amount of excess H 2 remaining, calculate how much H 2 is needed to produce 108 grams of H 2 O. It is also called sodium hyposulfite or "hypo". with a mortar and pestle. In Part B of this lab, the residue left after heating will be qualitatively analyzed in order to demonstrate that it is chemically different from the initial potassium chlorate sample. Be sure to use the average molarity determined for the \(\ce{KIO3}\) in Part A for these calculations. B To convert tons of oxygen to units of mass in grams, we multiply by the appropriate conversion factors: \[ mass \, of \, O_2 = 1.00 \, tn \times { 2000 \, lb \over tn} \times {453.6 \, g \over lb} = 9.07 \times 10^5 \, g \, O_2 \nonumber \]. Examples of complete chemical equations to balance: Fe + Cl 2 = FeCl 3. The potassium chlorate sample was not heated strongly or long enough. Resultant death was common. We use the same general strategy for solving stoichiometric calculations as in the preceding example. Reaction \ref{1} generates aqueous iodine, \(\ce{I2}\) (aq). It contains one potassium ,one iodine and three oxygen atoms per A stoichiometric quantity is the amount of product or reactant specified by the coefficients in a balanced chemical equation. : 7758-05-6 Product code : LC19590 Formula : KIO3 Synonyms : iodic acid, potassium salt / potassium iodine oxide / potassium triodate . To standardize a \(\ce{KIO3}\) solution using a redox titration. the formula of the substance remaining after heating kio3 Then convert the moles of hydrogen to the equivalent mass in tons.