hydrogen bromide has a melting point of -87 deg celsius and a boiling point of -67 deg celsius. it dissolbes in water to form an acidic solution. describe what is seen when chlorine is bubbled through the solution.
the answer writes solution turns yellow. but i think it should be reddish brown. after all , isnt this a displacement reaction and chlorine displaces bromine? please check for discrepancies.
next. a student carried out some experiments to compare the relative strengths f dilute ethanoic acid and dilute hydrochloric acid. name a solid substance that will react with both acids. describe what you will see during the reaction.
what do you use? metal? if yes, then would the reaction be faster with HCl because it is a stronger acid and is fully ionised, thereby having a higher amount of H + ions.
please help ASAP because i still have got to clear my humans studying for tomorrow. thanks!
Originally posted by bonkysleuth:hydrogen bromide has a melting point of -87 deg celsius and a boiling point of -67 deg celsius. it dissolbes in water to form an acidic solution. describe what is seen when chlorine is bubbled through the solution.
the answer writes solution turns yellow. but i think it should be reddish brown. after all , isnt this a displacement reaction and chlorine displaces bromine? please check for discrepancies.
next. a student carried out some experiments to compare the relative strengths f dilute ethanoic acid and dilute hydrochloric acid. name a solid substance that will react with both acids. describe what you will see during the reaction.
what do you use? metal? if yes, then would the reaction be faster with HCl because it is a stronger acid and is fully ionised, thereby having a higher amount of H + ions.
please help ASAP because i still have got to clear my humans studying for tomorrow. thanks!
>>> hydrogen bromide has a melting point of -87 deg celsius and a boiling point of -67 deg celsius. it dissolbes in water to form an acidic solution. describe what is seen when chlorine is bubbled through the solution.
the answer writes solution turns yellow. but i think it should be reddish brown. after all , isnt this a displacement reaction and chlorine displaces bromine? please check for discrepancies. <<<
Correct.
FYI, displacement is a redox reaction. Chlorine is a stronger oxidizing agent compared to bromine, and hence will displace bromide ions (which is the reducing agent) from solution. The reason has to do with distance between nucleus and valence shell, and therefore, down the Group, a differential readiness to gain electrons (for halogens) and lose electrons (for halide ions).
>>> next. a student carried out some experiments to compare the relative strengths f dilute ethanoic acid and dilute hydrochloric acid. name a solid substance that will react with both acids. describe what you will see during the reaction.
what do you use? metal? if yes, then would the reaction be faster with HCl because it is a stronger acid and is fully ionised, thereby having a higher amount of H + ions. <<<
Correct. But, both being monoprotic acids (aka monobasic acids), they have the same no. of acidic protons (H+ ions). It's the molarity (concentration) of protons (H+ ions) for which strong acids is much higher than weak acids, hence rate of reaction to produce the gas will be faster.
Exam Tips :
1) When answering the question, do include relevant equations.
2) Specify a reactive metal (eg. magnesium). Otherwise, use carbonates.
3) State that a gas syringe is used to collect gas evolved; and rate of gas evolved over time can be calculated for comparison.