bilan. a) Lorsqu'on plonge une lame de fer dans une solution de sulfate de nickel (II), on observe un dépôt métallique. Ecrire l'équation-bilan de la réaction. b) Lorsqu'on plonge une lame de plomb dans une solution de sulfate de nickel (II), aucun dépôt n'apparaît. Montrer que ces deux expériences permettent de prévoir la place du nickel dans la classification électrochimique.

Which of the following is the function of the atomiser in the emission system of Atomic Absorption Spectroscopy? To split the beam into two To break the steady light into pulsating light To break large mass of liquid into small drops To reduce the sample into atomic state

\( \_ CaO + \ldots HCl \rightarrow CaCl _ { 2 } + \ldots H _ { 2 } O \)

Which of the following is an example of anionic interference in atomic emission spectroscopy? O Interference of high concentration of sodium ions in assay calcium ions. Interference by formation of less volatile salt with sulphat by calcium. Decreased drop size of the analyte solution by alcohols.

\( - Mg ( OH ) _ { 2 } + \ldots HCl \rightarrow MgCl _ { 2 } + \ldots H _ { 2 } O \)

Quanti grammi di soluto bisogna aggiungere a \( 50,0 \mathrm{~g} \) di una soluzione al \( 10,0 \% \mathrm{~m} / \mathrm{m} \) perché la sua concentrazione raddoppi?