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Ch.6 - Ionic Compounds: Periodic Trends and Bonding Theory
McMurry - Chemistry 8th Edition
McMurry8th EditionChemistryISBN: 9781292336145당신이 사용하는 게 아니라요?교과서 변경
모든 교과서McMurry 8th EditionCh.6 - Ionic Compounds: Periodic Trends and Bonding Theory문제 78c
6장, 문제 78c

Element X reacts with element Y to give a product containing X3+ ions and Y2- ions. (c) What is the formula of the product?

검증된 단계별 안내
1
Identify the charges of the ions involved in the compound. Element X forms X^{3+} ions, and element Y forms Y^{2-} ions.
Determine the ratio of X^{3+} ions to Y^{2-} ions needed to balance the overall charge of the compound. The goal is to have a neutral compound.
Use the least common multiple (LCM) of the charges to find the smallest whole number ratio of X and Y that results in a neutral compound. The LCM of 3 and 2 is 6.
Calculate the number of X^{3+} ions needed to reach a total positive charge of +6. This requires 2 X^{3+} ions (2 * 3 = +6).
Calculate the number of Y^{2-} ions needed to reach a total negative charge of -6. This requires 3 Y^{2-} ions (3 * -2 = -6).

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이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
59s

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Ionic Charges

Ionic charges are the electrical charges that ions carry, determined by the loss or gain of electrons. In this case, element X forms X<sup>3+</sup> ions, indicating it has lost three electrons, while element Y forms Y<sup>2-</sup> ions, meaning it has gained two electrons. Understanding these charges is crucial for determining how ions combine to form neutral compounds.
추천 영상:
가이드 코스
01:53
Formal Charge

Chemical Formula

A chemical formula represents the composition of a compound, indicating the types and ratios of atoms present. To derive the formula from the ionic charges, we must balance the total positive and negative charges. This ensures that the resulting compound is electrically neutral, which is a fundamental principle in chemistry.
추천 영상:
가이드 코스
02:26
Skeletal Formula

Criss-Cross Method

The criss-cross method is a technique used to determine the formula of an ionic compound by using the absolute values of the ionic charges. In this method, the charge of one ion becomes the subscript of the other ion. For example, with X<sup>3+</sup> and Y<sup>2-</sup>, we would take the 2 from Y and make it the subscript of X, and the 3 from X as the subscript of Y, leading to the formula XY<sub>3</sub>.
추천 영상:
가이드 코스
01:49
Method 1 of Radioactive Half-Life
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