Hydrogen bromide is a highly reactive and corrosive gas used mainly as a catalys
ID: 762349 • Letter: H
Question
Hydrogen bromide is a highly reactive and corrosive gas used mainly as a catalyst for organic reactions. It is produced by reacting hydrogen and bromine gases together.
The rate is followed by measuring the intensity of the orange color of the bromine gas. The data is recorded in the table in the picture below.
a. What is the order of the reaction with respect to hydrogen, bromine, and overall?
b. Write the rate expression for the reaction.
c. Calculate k for the reaction. what are the units for k?
d. when [H2]=0.455 M and [Br2]=0.215 M, what is the rate of the reaction?
I would really appreciate your help! Thank you so much ahead of time!
Explanation / Answer
www.freepatentsonline.com/3980722.html Hydrogen bromide is the diatomic molecule HBr. HBr is a gas at standard conditions. Hydrobromic acid forms upon dissolving HBr in water. Conversely, HBr can be liberated from hydrobromic acid solutions with the addition of a dehydration agent, but not by distillation. Hydrogen bromide and hydrobromic acid are, therefore, not the same, but they are related. Commonly, chemists refer to hydrobromic acid as "HBr", and this usage, while understood by most chemists, is imprecise and can be confusing to the non-specialist. Contents [hide] 1 General description 2 Uses of HBr 3 Industrial preparation 4 Laboratory synthesis 5 References [edit]General description At room temperature, HBr is a nonflammable gas with an acrid odor, fuming in moist air because of the formation of hydrobromic acid. HBr is very soluble in water, forming hydrobromic acid solution, which is saturated at 68.85% HBr by weight at room temperature. Aqueous solutions that are 47.6% HBr by weight form a constant-boiling mixture (reverse azeotrope) that boils at 124.3°C. Boiling less concentrated solutions releases H2O until the constant boiling mixture composition is reached. [edit]Uses of HBr There are many uses of HBr in chemical synthesis. For example, HBr is used for the production of alkyl bromides from alcohols: ROH + HBr ? RBr + H2O HBr adds to alkenes to give bromoalkanes, an important family of organobromine compounds: RCH=CH2 + HBr ? RCH(Br)–CH3 HBr adds to alkynes to yield bromoalkenes. The stereochemistry of this type of addition is usually anti: RC=CH + HBr ? RC(Br)=CH2 HBr adds to the haloalkene to form a geminal dihaloalkane. (This type of addition follows Markovnikov's rule): RC(Br)=CH2 + HBr ? RC(Br2)–CH3 Also, HBr is used to open epoxides and lactones and in the synthesis of bromoacetals. Additionally, HBr catalyzes many organic reactions.[4][5][6][7] HBr has been proposed for use in a utility-scale flow-type battery.[8] [edit]Industrial preparation
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