關鍵區別-平衡方程式與淨離子方程式

所有的化學反應都可以寫成一個方程式。這個方程的組成部分包括反應物及其物理狀態，一個表示反應方向的箭頭，以及反應與其物理狀態的產物。如果使用了任何特殊條件，它們也會簡短地寫在箭頭上。如果反應處於平衡狀態，則在相反方向使用兩個半箭頭。化學方程式有兩種寫法：平衡方程式或淨離子方程式。平衡方程和淨離子方程的關鍵區別在於，平衡方程反映的是系統中發生的所有反應，而淨離子方程只表示特定反應完成後發生的淨反應。

內容1。概述和主要區別2。等式3是平衡的。什麼是淨離子方程式。並列比較-平衡方程式與淨離子方程式5。摘要

什麼是平衡方程式(a balanced equation)？

Chemical reacti*** are very important in understanding the behavior of a particular system. By writing the correct equation for the reaction, one can get an idea about the changes of different species in that system. For simple reacti*** such as dissolving of NaCl in water, the equation can be written easily by predicting the possible products of that reaction. But for other complex reacti***, further tests may have to be carried out in order to find out the products of that particular system. But most of the times, the written equation is very likely to be unbalanced, which makes it difficult to explain the chemical behavior of that system. Therefore, unbalanced equati*** should also be balanced. The balanced equation includes all reactants and products of that system. The equation is written by c***idering the reactant compound as a molecule. For example, the balanced equation between KI and PbNO₃ (if those were reacted in water) would be;

平衡方程的重要性在於，它揭示了應添加的反應物的量，給出了系統中物種之間的化學計量關係的詳細信息。在上面的例子中，當向系統中添加這些組件時，PbNO3和KI之間的比率應該是1:2。

什麼是淨離子方程(a net ionic equation)？

The net ionic equation shows only the overall reaction that has taken place in the system. It includes the ionic species and formed products. But it does not indicate all the reacti*** that have happened in a particular system. For example, if there is a reaction between two molecules using water as the medium, the compounds may have dissolved in water and separated into i***. Some of these i*** may be involved in the reaction but some may not. Then the net ionic equation includes only the i*** that participated in a net reaction. Other i***, which are called spectator i***, are eliminated from the equation to obtain the net ionic equation. For example, if KI and PbNO₃ reacted in water, the net ionic reaction would be;

這也應包括K+離子和NO3-離子，但這些離子只會溶解，不參與主要反應；因此，它們不包括在淨離子反應中。

平衡方程(balanced equation)和淨離子方程(net ionic equation)的區別

總結 - 平衡方程(balanced equation) vs. 淨離子方程(net ionic equation)

當某些離子化合物被添加到水中時，它們會分解並形成溶解在水中的離子。這會產生陰離子和陽離子。為了顯示反應完成後生成的物種和反應的方向，可以寫一個化學方程式。考慮到箭頭兩側的每種原子的數量，這個方程可以被平衡；有時，甚至這些物種的電荷也應該考慮在內。這就為那個特定的體系給出了一個平衡的化學方程式。然而，淨離子方程只包括反應物。如前所述，平衡方程和淨離子方程的關鍵區別在於，平衡方程表示系統中的所有反應，而淨離子方程只顯示特定反應完成時發生的淨反應。