男人资源站-涩涩五月天-加勒比一区二区-欧美丰满少妇-清纯唯美亚洲-蜜臀久久99精品久久久久宅男-1024手机在线观看-a免费在线观看-日韩一区二区三免费高清在线观看-激情欧美一区二区-日韩综合网站-色小说av-夜夜夜操操操-色片在线播放-免费在线观看中文字幕

  • 翰林提供學術活動、國際課程、科研項目一站式留學背景提升服務！
Home » 國際課程 » IB課程 » Details

IB DP Chemistry: SL復習筆記7.1.3 Equilibrium Constant Relationships

Category: IB課程, 教材筆記, 福利干貨 Date: 2022年8月4日 下午3:31

Equilibrium Constant Relationships

  • In the previous section we saw that the concentrations of the substances are raised to the?power of the coefficients?from the balanced equation
  • This means the?Kc?expression?is dependent on a specific equation
  • For example, take the reaction between nitrogen and hydrogen to make ammonia

?N2(g)??? +??? 1?H2(g)? ?? ? ?NH3(g)

  • The?Kc?expression?for this reaction is:

7.1.3-Kc-expression-for-NH3

  • If you double the stoichiometry the equation becomes

N2(g)??? +??? 3H2(g)? ? 2NH3(g)

  • The new?Kc?expression?for this reaction is then:

7.1.3-Kc-expression-for-NH3-doubled

  • What is the relationship between these two?Kc?values? You can probably see that when we double the coefficient the new?Kc?is the square of the original value:

7.1.3-Kc-relationships-squared

  • If we reverse the equation:

2NH3(g)?? N2(g)??? +??? 3H2(g)

  • Kc? becomes the reciprocal of the original Kc?value:

7.1.3-Kc-expression-for-NH3-reversed

  • Test your understanding in the following example:

Worked Example

Kc?for 2NO2?(g) + F2?(g) ? 2NO2F (g) is 7.1 × 1032What is?Kc?for the following reaction, at the same temperature?

NO2F (g) ?? NO2?(g) + ?F2?(g)

7.1.3-Worked-Example-Question6

Answer:

The correct option is?B.

    • The original equation has been reversed and halved, so the?Kc?value must be square rooted and inverted to obtain the reciprocal

Exam Tip

You must use square brackets in equilibrium constant expressions as they have a specific meaning, representing concentrations. In an exam answer you would lose the mark if you used round brackets

 

 

 

 

轉載自savemyexams

以上就是關于【IB DP Chemistry: SL復習筆記7.1.3 Equilibrium Constant Relationships】的解答，如需了解學校/賽事/課程動態，可至翰林教育官網獲取更多信息。

往期文章閱讀推薦：

深耕九載！30+國際競賽/課程講義，碩博100%團隊操刀，助力爬藤沖G5！

哈佛官方推薦書單曝光！原來普娃和藤校娃的差距還有閱讀！

? 2026. All Rights Reserved. 滬ICP備2023009024號-1

國際競賽 國際競賽
了解背提項目
國際課程 國際課程
國際課程
商務合作 商務合作
商務合作
課程試聽 課程試聽