diff --git a/src/lab/exp15/Procedure.html b/src/lab/exp15/Procedure.html
index 48e38cb..f253c15 100644
--- a/src/lab/exp15/Procedure.html
+++ b/src/lab/exp15/Procedure.html
@@ -123,9 +123,9 @@ <h1 class="text-h2-lightblue">Study of the Catalytic Effects of Finely Divided P
 <strong><b>TABLE 1: Conditions and some characteristics of prepared gold particles</b></strong>
 </p>
 <p align="center">
-<table align="center" cellpadding="7" cellspacing="1" width="638">
+<table align="left" border="1" cellpadding="7" cellspacing="1" width="638">
 <colgroup>
-<col width="56"></col>
+<col width="100"></col>
 <col width="127"></col>
 <col width="126"></col>
 <col width="151"></col>
@@ -134,48 +134,47 @@ <h1 class="text-h2-lightblue">Study of the Catalytic Effects of Finely Divided P
 <tbody>
 <tr valign="TOP">
 <td width="46">
-<p align="LEFT">
+<p align="center">
                         Sample
                     </p>
 </td>
 <td width="117">
-<p align="LEFT">
+<p align="center">
                         [seed-Au] /mol.L<sup>-1</sup>
 </p>
 </td>
 <td width="116">
-<p align="LEFT">
+<p align="center">
                        [Au<sup>3+</sup>]/mol.L<sup>-1</sup>
 </p>
 </td>
 <td width="141">
-<p align="LEFT">
+<p align="center">
                         λ<sub>max/nm</sub>
 </p>
 <td width="149">
-<p align="LEFT">
+<p align="center">
                         λ=350 nm
                     </p>
 </td>
 </td></tr>
 <tr valign="TOP">
 <td width="46">
-<p align="LEFT">
+<p align="center">
                         Seed
                     </p>
 </td>
 <td width="117">
-<p align="LEFT">
+<p align="center">
                         1.00 × 10<sup>-4</sup>
 </p>
 </td>
 <td width="116">
-<p align="LEFT">
-<br>
-</br></p>
+<p align="center">
+<br><br/> </p>
 </td>
 <td width="141">
-<p align="LEFT">
+<p align="center">
                         522
                     </p>
 </td>
@@ -188,81 +187,81 @@ <h1 class="text-h2-lightblue">Study of the Catalytic Effects of Finely Divided P
 </tr>
 <tr valign="TOP">
 <td width="46">
-<p align="LEFT">
+<p align="center">
                        Sample 1
                     </p>
 </td>
 <td width="117">
-<p align="LEFT">
+<p align="center">
                         1.00 × 10<sup>-5</sup>
 </p>
 </td>
 <td width="116">
-<p align="LEFT">
+<p align="center">
                         9.00 × 10<sup>-5</sup>
 </p>
 </td>
 <td width="141">
-<p align="LEFT">
+<p align="center">
                         529
                     </p>
 </td>
 <td width="149">
-<p align="LEFT">
+<p align="center">
                         21.5
                     </p>
 </td>
 </tr>
 <tr valign="TOP">
 <td width="46">
-<p align="LEFT">
+<p align="center">
                        Sample 2
                     </p>
 </td>
 <td width="117">
-<p align="LEFT">
+<p align="center">
                        3.33 × 10<sup>-6</sup>
 </p>
 </td>
 <td width="116">
-<p align="LEFT">
+<p align="center">
                         9.67 × 10<sup>-5</sup>
 </p>
 </td>
 <td width="141">
-<p align="LEFT">
+<p align="center">
                         531
                     </p>
 </td>
 <td width="149">
-<p align="LEFT">
+<p align="center">
                         31.1
                     </p>
 </td>
 </tr>
 <tr valign="TOP">
 <td width="46">
-<p align="LEFT">
+<p align="center">
                         Sample 3
                     </p>
 </td>
 <td width="117">
-<p align="LEFT">
+<p align="center">
                         1.00 × 10<sup>-6</sup>
 </p>
 </td>
 <td width="116">
-<p align="LEFT">
+<p align="center">
                         9.90 × 10<sup>-5</sup>
 </p>
 </td>
 <td width="141">
-<p align="LEFT">
+<p align="center">
                         534
                     </p>
 </td>
 <td width="149">
-<p align="LEFT">
+<p align="center">
                         46.4
                     </p>
 </td>
diff --git a/src/lab/exp8/Theory.html b/src/lab/exp8/Theory.html
index f70b264..0dc0147 100644
--- a/src/lab/exp8/Theory.html
+++ b/src/lab/exp8/Theory.html
@@ -106,7 +106,7 @@ <h1 class="text-h2-lightblue">Demonstration of the Surface-Effect on Chemical Pr
 <div align="center"> 4Ag<sup>+</sup>  + C<sub>6</sub>H<sub>5</sub>O<sub>7</sub>Na<sub>3</sub> + 2H<sub>2</sub>O (l) → 4Ag<sup>0</sup> + C<sub>6</sub>H<sub>5</sub>O<sub>7</sub>Na<sub>3</sub> + 3Na<sup>+</sup> + H<sup>+</sup> + O<sub>2</sub> ↑ </div> <br>
 <div align="center"> n Ag<sup>0</sup> → (Ag<sup>0</sup>)<sub>n</sub><br> </br></div>
 
-where n is the number of atoms aggregate together to form a colloid particle.
+<div align="center">where n is the number of atoms aggregate together to form a colloid particle.</div>
 </br></p>
 <p>
 The colloid is made of nanoscale Ag particles suspended in the aqueous solution. The particles acquire negative charge and remain suspended in solution due to the repulsion caused by the surface adsorption of the citrate anions. Concentrations of AgNO<sub>3</sub> and reducing agent, reaction time, solution temperature, etc. influence the particle size. </p>