What is the formula of Lithium Hydroxide?

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Study for the IGCSE Edexcel Chemistry Test. Access flashcards and multiple choice questions with hints and explanations. Get ready for your exam!

Multiple Choice

What is the formula of Lithium Hydroxide?

Explanation:
The key idea is balancing charges to form a neutral compound. The hydroxide ion carries a -1 charge (OH−), and lithium forms a +1 cation (Li+). To balance the charges, you need one Li+ for every one OH−, giving the formula LiOH. This represents one lithium ion paired with one hydroxide ion in a neutral salt. The other options would not balance to a neutral compound: Li2OH would carry too much positive charge, LiOH2 would be too negative, and LiO2H isn’t the correct way to write a standard lithium hydroxide formula.

The key idea is balancing charges to form a neutral compound. The hydroxide ion carries a -1 charge (OH−), and lithium forms a +1 cation (Li+). To balance the charges, you need one Li+ for every one OH−, giving the formula LiOH. This represents one lithium ion paired with one hydroxide ion in a neutral salt. The other options would not balance to a neutral compound: Li2OH would carry too much positive charge, LiOH2 would be too negative, and LiO2H isn’t the correct way to write a standard lithium hydroxide formula.

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