Other Chemistry Answers

A standard solution is a ----------------.
Dilute solution
Solution of known concentration
Concentrated solution
Measured solution

Which the following is not a primary standard
Potassium permanganate
Oxalic acid
Ammonium iron (II)sulphate
Sodium oxalate

What is the oxidation of chromium in potassium dichromate?

+1

+4

+6

+7

When starch is used in iodiometric titration, the colour changes from -----------
Red to blue at the end point
Blue black to colourless at the end point
Colourless to orange at the end point
Light yellow to brown at the end point

Which of the following is not correct about potassium permanganate when used in titrimetric analysis?
It is a primary standard
It acts in acidic medium
It acts in basic medium
It requires the use of an external indicator

Theindicator for the acid- base titration in which the pH of solution end-point is 5-6 is ___________.
any indicator
phenolphthalein
methyl orange
no suitable indicator

A type of acid- base titration in which the pH of solution end-point is 5-6 is ___________.
strong acid vs strong base
strong acid vs weak base
weak acid vs strong base
weak acid vs weak base

In titration, the experimentally determined stoichiometric point of the titration is referred to as--------------.
Flash point
Critical point
Equivalence point
stop point

In a standardization titration involving hydrochloric acid and sodium carbonate, a student recoirded the following results for the volume of hydrochloric acid used against 10.00mL of the sodium carbonate solution : 15.60; 14.50; 14.70 aqnd 14.20. If the concentration of the
Na2CO3
standard solution is 0.75moldm^-3, calculate the concentration of the HCl solution
1.02 Ml
1.03mL
1.07mL
1.04M

In a standardization titration involving hydrochloric acid and sodium carbonate, a student recoirded the following results for the volume of hydrochloric acid used against 10.00mL of the sodium carbonate solution : 15.60; 14.50; 14.70 aqnd 14.20. What is the average titre value of the acid?
14.60mL
14.75mL
14.47mL
14.00mL