ICSE Class 8 Answered
describe the preparation of hydrogen in the laboratory
Asked by nathsantanukumar | 23 Jun, 2018, 08:44: PM
Expert Answer
Laboratory Preparation of Hydrogen:
Hydrogen is prepared in the laboratory by the action of the dilute hydrochloric acid or dilute sulphuric acid on granulated zinc.
Use of Granulated Zinc
Granulated zinc contains an impurity like copper which acts as a positive catalyst. A positive catalyst increases the rate of a chemical equation. This is the reason why granulated zinc is preferred over pure zinc for the laboratory preparation of hydrogen gas.
Reaction:
Metal + Dilute acid → Salt + Hydrogen
Zn + 2HCl → ZnCl2 + H2 ↑ Zn + H2SO4 → ZnSO4 + H2 ↑ |
Collection of Gas: Hydrogen gas is collected by downward displacement of water.
Answered by Ramandeep | 25 Jun, 2018, 11:25: AM
Concept Videos
ICSE 8 - Chemistry
Asked by vinodlucknow251 | 08 Mar, 2024, 02:27: PM
ANSWERED BY EXPERT
ICSE 8 - Chemistry
Asked by palashmit53 | 08 Mar, 2022, 06:54: PM
ANSWERED BY EXPERT
ICSE 8 - Chemistry
Asked by sunitashah0104 | 26 May, 2020, 09:51: PM
ANSWERED BY EXPERT
ICSE 8 - Chemistry
Asked by SindujaAlluri17 | 09 Jan, 2020, 03:35: PM
ANSWERED BY EXPERT
ICSE 8 - Chemistry
Asked by Aparajitahatibaruah | 30 Dec, 2019, 08:54: PM
ANSWERED BY EXPERT
ICSE 8 - Chemistry
Asked by knkprasad5669 | 18 Nov, 2019, 09:43: PM
ANSWERED BY EXPERT
ICSE 8 - Chemistry
Asked by sn09011977 | 08 Jun, 2019, 09:51: AM
ANSWERED BY EXPERT
ICSE 8 - Chemistry
Asked by chaudharysn165 | 21 Sep, 2018, 07:57: PM
ANSWERED BY EXPERT
ICSE 8 - Chemistry
Asked by nathsantanukumar | 23 Jun, 2018, 09:01: PM
ANSWERED BY EXPERT
ICSE 8 - Chemistry
Asked by nathsantanukumar | 23 Jun, 2018, 09:00: PM
ANSWERED BY EXPERT