Q1- What is primary standard solution and secondary standard solution ?
Ans_- Primary solution- Concentration change in accordance of time
Eg- hcl,oxalic acids
Secondary solution- Concentration do not change in accordance of time
Example=- NaOH
Q2- Phenopthalein ph range?
Ans - 8.3- 10
In accordance google- 8.5- 10
Internal indicater behave karte hai
It can be given in lab in liquid state
Q3- Meaning of concordant reading?
Ans- volume used by naoh give as a same reading
Q4- Kmno4 act as self indicater?
Ans- acts as oxoidising agentbehave in all medium
Q5- structure of phenopthalein
Q6- Give the reaction of naoh and oxalic acid?
Ans sod.oxalate
Q7 Why HCl act as primary and naoh act as secondary solution?
Ans - oxalic ,hcl, it means it behave as secondary solution Titration
Firstly we take all apparatus
- Wash this apparatus carefully
- Prepare to standarise0.1N hcl,oxalic acid
- NaOH prepare with the help oh 0.1 N hcl solution
- Naoh- burette
- Oxalic ,hcl take a beker, conical flask
- Phenolpthalein,methyl orange drop
- Coloreless to pink
- Yellow to red (3.4- 4.4)
- Ph <7 acidic and PH.7 act as base
- Phrange what does effect on temp
- Ph inversely propotional to temp
- At increase temp the molar conduictivity of molecule increases
- Ph range decrease
