Tes Awal Modul VIII Kimia Analisa - Senin 04 Mei

What is the complexometric indicator that is normally used in EDTA-based titration?

• Eriocrome Black T

• Eriochrome Black T

• Erochrome Black T

• None of the above

What are the potential sites for dative covalent bonding in EDTA complex?

• 2 N's and 2 O's

• 2 N's and 4 O's

• 4 N's and 2 O's

• 4 N's and 4 O's

What is the unit for calculating hardness of water?

• g/L

• parts per billion

• parts per million

• non of the above

What is the color change of Eriochrome Black T in EDTA titration?

• Red to green

• Red to blue

• Blue to purple

• Purple to black

What is the pH of the buffer solution used in a normal EDTA titration?

• 8

• 9

• 10

• 11

Total hardness is calculated assuming that it was ALL ____?

• MgSO₄

• CaCl

• Al₂O₃

• CaCO₃

What is the mole ratio between EDTA and metal cation in complexometric titration?

• 1:6

• 1:4

• 1:2

• 1:1

The PH value of the drinking water is about?

• 6.5 - 8.5

• 5.5 - 6.5

• 4.5 - 5.5

• 3.5 - 4.5

EDTA has the ability to form _________ with metal ions.

• stable complexes

• unstable complexes

• salts

• acids

What is Complexometric Titration?

• The volumetric titration through which end point can be determined by different stabilities of metal-indicator and metal-titrant complex

• The volumetric titration through which end point can't be determined by different stabilities of metal-indicator and metal-titrant complex

• The volumetric titration through which end point maybe determined by different stabilities of metal-indicator and metal-titrant complex

• The volumetric titration through which end point can be determined by similar stabilities of metal-indicator and metal-titrant complex