diff --git a/education/chemistry/1.html b/education/chemistry/1.html
index 1f7cfac..598f27a 100644
--- a/education/chemistry/1.html
+++ b/education/chemistry/1.html
@@ -2,7 +2,7 @@
 title: 1
 description: 
 published: true
-date: 2026-02-11T15:50:25.348Z
+date: 2026-02-11T15:51:27.344Z
 tags: 
 editor: ckeditor
 dateCreated: 2026-02-11T14:58:54.870Z
@@ -446,38 +446,38 @@ dateCreated: 2026-02-11T14:58:54.870Z
       </tr>
       <tr>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">H<sup>+</sup></span></td>
-        <td>&nbsp;</td>
-        <td>&nbsp;</td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Hydrogen ion</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Combined</span></td>
       </tr>
       <tr>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Cu<sup>+</sup></span></td>
-        <td>&nbsp;</td>
-        <td>&nbsp;</td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Copper (I) ion</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Insoluble</span></td>
       </tr>
       <tr>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Cu<sup>2+</sup></span></td>
-        <td>&nbsp;</td>
-        <td>&nbsp;</td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Copper (II) ion</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Greenish blue</span></td>
       </tr>
       <tr>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Fe<sup>2+</sup></span></td>
-        <td>&nbsp;</td>
-        <td>&nbsp;</td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Iron (II) ion</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Pale green</span></td>
       </tr>
       <tr>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Fe<sup>3+</sup></span></td>
-        <td>&nbsp;</td>
-        <td>&nbsp;</td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Iron (III) ion</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Yellow</span></td>
       </tr>
       <tr>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Ni<sup>2+</sup></span></td>
-        <td>&nbsp;</td>
-        <td>&nbsp;</td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Nickel (II) ion&nbsp;</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Green</span></td>
       </tr>
       <tr>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Cr<sup>3+</sup></span></td>
-        <td>&nbsp;</td>
-        <td>&nbsp;</td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Chromium (III) ion</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Green</span></td>
       </tr>
     </tbody>
   </table>