Complete 1- Volumetric analysis depends on -------------------- 2- Normal soln is ......................while molar soln
Posted: Mon May 02, 2022 7:42 pm
Complete
1- Volumetric analysis depends on --------------------
2- Normal soln is ......................while molar soln is ...........................
3- Examples of primary standard solutons ,..................,..............,............. 4- Primary standard solution must react .......................
5- Standardization factor is .................................................
Choose the correct answer
1. Among the primary standard substances is
a- solid NaOH pellets
c- KHphthalate
2- Lewis' acids are species that
a- gain protons
c- loose lone-pairs of electrons
3- Empirical solution is standard solution that has
a- gMol. Wt . /L (solution) b- gEqu. Wt . /L (solvent) c- both a & b d- neither a nor b
4- A typical example of one-color indicators is
a- xylenol orange
c- phenolphthalein
5- phenolphthalein is colorless in
a- moderate alkaline media
c- acidic media
6- neutralization titration curves represent the relation between
a- pH-change & indicator-colors b- change of pH & titrant volume c- change [H+] & indicator-colors d- both a & c
7- The suitable indicator for CH3COOH-NaOH titration is
a- methyl orange b- phenol red
c- phenolphthalein d- methyl red
8- According to Bronsted-lowry theory, amines (R.NH2) are
a- acids b- bases c- adducts d- salts
Discuss ?
1. the requirements for volumetric or titrimetric analysis.
.
1- Volumetric analysis depends on --------------------
2- Normal soln is ......................while molar soln is ...........................
3- Examples of primary standard solutons ,..................,..............,............. 4- Primary standard solution must react .......................
5- Standardization factor is .................................................
Choose the correct answer
1. Among the primary standard substances is
a- solid NaOH pellets
c- KHphthalate
2- Lewis' acids are species that
a- gain protons
c- loose lone-pairs of electrons
3- Empirical solution is standard solution that has
a- gMol. Wt . /L (solution) b- gEqu. Wt . /L (solvent) c- both a & b d- neither a nor b
4- A typical example of one-color indicators is
a- xylenol orange
c- phenolphthalein
5- phenolphthalein is colorless in
a- moderate alkaline media
c- acidic media
6- neutralization titration curves represent the relation between
a- pH-change & indicator-colors b- change of pH & titrant volume c- change [H+] & indicator-colors d- both a & c
7- The suitable indicator for CH3COOH-NaOH titration is
a- methyl orange b- phenol red
c- phenolphthalein d- methyl red
8- According to Bronsted-lowry theory, amines (R.NH2) are
a- acids b- bases c- adducts d- salts
Discuss ?
1. the requirements for volumetric or titrimetric analysis.
.