E q u a t i o n 1 2 N a C l O 3 ( s ) ’! 8. Measure the mass a second time. It is a white crystalline powder that is readily soluble in water. Compare the actual mass of product obtained in Trials 1 and 2 with the calculated or expected masses. ` ô Õ 0 Ê R › � › & & � � � � › D A A § A A A A A z z & & Ä ê — & & ê Decomposition of Sodium Chlorate Mass, Moles, and the Chemical Equation Introduction: Sodium chlorate is used as a source of oxygen in emergency oxygen generators. Sodium chlorate is an inorganic compound with the chemical formula NaClO3. 3. 4. The solid should begin to melt and bubble slightly. Cool the test tube on the wire gauze until it is room temperature. The ultimate products of the thermal decomposition of sodium chlorate are oxygen gas and a white solid. Repeat steps 13-15 using test tube #2. ( a c t u a l m a s s e x p e c t e d m a s s ) e x p e c t e d m a s s C o n s i d e r t h e f o l l o w i n g p o t e n t i a l s o u r c e s o f e r r o r ! If any smoke is produced, remove the test tube from the flame until the reaction subsides. Avoid contact with eyes and skin. 11. Keep away from contact with organic materials, including rubber stoppers, rubber tubing, etc. Obtain two medium test tubes. Continue to heat the test tube in the burner flame until no more bubbling is observed and the material in the test tube has solidified. The compound may be used in combination with other herbicides such as atrazine, 2,4-D, bromacil, diuron, and sodium metaborate. ° Ü Ş ö ø F H l n ¦ ¨ Î Ğ ® ¯ ° ¦ Å Æ Ç Ù Û ‹ – — ú I ] « £ ª " R S û óèäÚÒäÒÚÒäÊäÆ¾Æ¾Æ¾ÆäÆ¾Æ¾Æ¾Æ¾Æ¶Æ²Æ²Æ²¨ ²¨œ²˜²˜”˜”Œ”ˆ”ˆ hÆœ hÓ‘ hÓ‘ 6�hÓ‘ hyg h¸iæ hk5› h´ 5�hk5› h´ 5�>* h´ h´ hkÄ H*hkÄ hkÄ H*hkÄ hkÄ hbˆ H*hk5› hbˆ 5�hk5› hbˆ 5�>* hbˆ hk5› hbˆ CJ aJ hk5› hbˆ 5�CJ( aJ( 5 ! 4 g of sodium chlorate to the bottom of each test tube. Using a spatula, add approximately 0. 6. When heated above 300 °C, it begins to lose oxygen. Holding test tube #1 with the test tube clamp, slowly move the test tube back and forth through the burner flame to gently heat the solid. Caution: Do not aim the opening of the test tube at anymore. Based on the molar masses of the three possible solid products in Equations 1-3, and the number of moles of reactant in each case, calculate the expected masses of the three possible products for Trials 1 and 2. Sodium chlorate decomposes upon heating or in the presence of metals to give oxygen gas. Sodium chlorate, NaClO3, is a colorless, odorless, white solid that melts at 248 °C. It can also kill through root absorption. All perchlorate compounds are produced industrially by the oxidation of solutions of sodium chlorate by electrolysis.. Barium peroxide (BaO2) is used to absorb the chlorine that is a minor product in the decomposition. A small amount of smoke may be inevitable and should not interfere with the accuracy of the results. Sodium chlorate decomposes upon heating or in the presence of metals to give oxygen gas. Sodium chlorate is toxic: "doses of a few grams of chlorate are lethal". If the second mass differs from the first mass by more than 0.02 g, repeat the heating cycle a third time. Heat required to initiate this reaction is generated by oxidation of a small amount of iron powder mixed with the sodium chlorate, and the reaction consumes less oxygen than is produced. N o t e t h a t e q u a t i o n s 1 - 3 a r e n o t b a l a n c e d . The ultimate products of the thermal decomposition of sodium chlorate are oxygen gas and a white solid. 10. The smoke represents a loss of starting material due to evaporation of molten sodium chlorate and will reduce the yield of product.  The oxidative effect on hemoglobin leads to methaemoglobin formation, which is followed by denaturation of the globin protein and a cross-linking of erythrocyte membrane proteins with resultant damage to the membrane enzymes. Retrieved October 14, 2020, from https://newyorkessays.com/essay-decomposition-of-sodium-chlorate-lab/, Save Time On Research and Writing. Consider the following potential sources of error in this experiment. © 5. Sodium chlorate is the active ingredient in a variety of commercial herbicides. Measure and record the mass of each test tube. Keep away from contact with organic materials, including rubber stoppers, rubber tubing, etc. Explain whether they would have caused the actual mass of solid product to be lower or higher than the expected value. Several hundred million tons are produced annually, mainly for applications in bleaching pulp to produce high brightness paper. � Place test tube #1 in a test tube clamp. It is possible to determine the chemical equation for the decomposition of sodium chlorate by applying the principles of stoichiometry to the masses of the reactants and products. Note that equations 1-3 … c) The sodium chlorate absorbed some moisture from the air before the experiment began and was not completely dry. Measure and record the combined mass of each test tube and sodium chlorate. In addition, this enzyme is directly denatured by chlorate. Sodium chlorate decomposes upon heating or in the presence of metals to give oxygen gas. It is considered phytotoxic to all green plant parts. Holding the test tube in an almost horizontal position, gently tap the test tube to distribute the solid sodium chlorate evenly along the bottom one-third of the test tube. © All perchlorate compounds are produced industrially by the oxidation of solutions of sodium chlorate by electrolysis. 2. Based on the molecular formula of sodium chlorate, three possible reactions will account for the loss of oxygen gas upon heating (Equations 1-3). Chlorate de sodium", This page was last edited on 11 October 2020, at 17:49. All are white solids at room temperature. The sodium chlorate process is not to be confused with the Chloralkali process, which is an industrial process for the electrolytic production of sodium hydroxide and chlorine gas. U s e t h e f o l l o w i n g e q u a t i o n t o d e t e r m i n e t h e p e r c e n t e r r o r i n t h e m a s s o f s o l i d o b t a i n e d . (actual mass – expected mass) expected mass 5. Sodium chlorate was an extensively used weed killer within the EU, until 2009 when it was withdrawn after a decision made under terms of EU Regulations. Background: Sodium chlorate, NaClO3, is a colorless, odorless, white solid that melts at 248 °C. For each trial, find the initial mass of sodium chlorate and calculate the number of moles of sodium chlorate. Safety Precautions: Sodium chlorate is a strong oxidizing agent and a dangerous fire risk; it is slightly toxic by ingestion. So-called oxygen canisters or oxygen candles are found on airplanes, submarines, even the space station–anywhere where oxygen might be in short supply in case of an emergency. Let a Professional Writer Help You, © New York Essays 2020. Based on the molecular formula of sodium chlorate, three possible reactions will account for the loss o f o x y g e n g a s u p o n h e a t i n g ( E q u a t i o n s 1 - 3 ) . H I W X ô õ œ Procedure: Measure all masses to the nearest 0.01 g and record all data in the data table. What the chemical equation for the decomposition of sodium chlorate? Obtain two medium test tubes. A Flair for the Dramatic/Selfish Machines by Pierce the Veil. Based on the molar masses of the three possible solid products in Equations 1-3, and the number of moles of reactant in each case, calculate the expected masses of the three possible products for Trials 1 and 2. All rights reserved, Decomposition of Sodium Chlorate Lab. Marketed formulations contain a fire retardant. . 7. So-called oxygen canisters or oxygen candles are found on airplanes, submarines, even the space station–anywhere where oxygen might be in short supply in case of an emergency.
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