CBSE Class 10 Answered
(i) A student takes 2 ml of distilled water in four test tubes marked I, II, III and IV, and then adds sodium chloride solution to test tube I, calcium chloride solution to test tube II, hydrochloric acid to test tube III and magnesium chloride solution to test tube IV. [2] In which test tube/s will lather be formed with synthetic detergent? Justify.
Asked by Hardik | 12 Mar, 2019, 04:44: PM
Expert Answer
Detergents are the potassium or sodium salts of fatty acids.
Sodium salts dissolve in water and lather is formed.
Sulphates, chlorides and bicarbonates of magnesium and calcium make water hard.
When soap or detergent is added to the hard water sodium ions are replaced by calcium or magnesium ions and gets precipitated.
Therefore the formation of lather is prohibited.
Hence,
Lather will form in test tube I which contain sodium chloride solution.
No lather will form in test tubes II, III and IV.
Answered by Varsha | 12 Mar, 2019, 07:25: PM
Application Videos
-
Properties of salts ...
This video deals with solved problem based on the properties of salts. -
Properties of salts
This video deals with solved problem based on the properties and uses of sa... -
Properties of salts
This video deals with solved problem based on the properties and uses of sa... -
Baking Soda
The video explains alkaline pH, formation reaction and use in day-to-day...
-
Reaction of Sodium Bicarbonate with Acetic Acid
The video explains the reaction of sodium bicarbonate with acetic acid e...
Concept Videos
-
Acids, Bases and Salts
Important chemical compounds -
Acids, Bases and Salts
Important chemical compounds -
Acids, Bases and Salts
Important chemical compounds
CBSE 10 - Chemistry
Asked by p6917110 | 29 Oct, 2023, 09:06: AM
ANSWERED BY EXPERTCBSE 10 - Chemistry
Asked by namyabachhal | 16 Oct, 2023, 10:17: PM
ANSWERED BY EXPERTCBSE 10 - Chemistry
Asked by chetnasachdeva.sachdeva2006 | 25 Nov, 2021, 05:26: PM
ANSWERED BY EXPERTCBSE 10 - Chemistry
Asked by Trisha Gupta | 23 Sep, 2021, 06:56: AM
ANSWERED BY EXPERTCBSE 10 - Chemistry
Asked by aryac2904 | 24 Jul, 2021, 08:42: PM
ANSWERED BY EXPERTCBSE 10 - Chemistry
Asked by satyendraprajapati6285 | 29 Mar, 2021, 08:40: AM
ANSWERED BY EXPERTCBSE 10 - Chemistry
Asked by ShauryaSaxena1011 | 15 Feb, 2021, 08:26: PM
ANSWERED BY EXPERT
CBSE 10 - Chemistry
Asked by ayushkashyap13052002 | 30 Aug, 2020, 09:10: AM
ANSWERED BY EXPERTCBSE 10 - Chemistry
Asked by vandana.bihari.vb | 24 May, 2020, 03:07: PM
ANSWERED BY EXPERT
