What quantity of aluminium is deposited when a current of 10A is passed through a solution of an aluminium salt for 1930s? [Al = 27, F = 96500 C mol -1]

Assessment: JAMB UTME - Chemistry - 2010 Subject: Chemistry

Question 1 Report

What quantity of aluminium is deposited when a current of 10A is passed through a solution of an aluminium salt for 1930s?

[Al = 27, F = 96500 C mol -1]

Answer Details
The quantity of aluminium deposited can be calculated using the formula: Quantity of metal deposited = (I x t x m) / (n x F) where I is the current in amperes, t is the time in seconds, m is the molar mass of the metal, n is the number of electrons required to reduce one mole of the metal ions, and F is the Faraday constant. In this case, I = 10A, t = 1930s, m = 27g/mol, n = 3 (since aluminium ions have a 3+ charge and require three electrons to be reduced to metallic aluminium), and F = 96500 C/mol. Plugging these values into the formula, we get: Quantity of metal deposited = (10 x 1930 x 27) / (3 x 96500) = 1.8 g Therefore, the answer is option B: 1.8 g.

Download The App On Google Playstore

Everything you need to excel in your exams

Green Bridge CBT Mobile App
Personalized AI Learning Chat Assistant
200,000+ Exam Questions Across IGCSE, JAMB, WAEC & NECO
Over 3,900 Lesson Notes
Offline Support - Learn Anytime, Anywhere
Green Bridge Timetable
Literature Summaries & Potential Questions
Track Your Performance & Progress
In-depth Explanations for Comprehensive Learning