Merge pull request #10 from virtual-labs/dev

Dev

experiment-descriptor.json

@@ -13,6 +13,13 @@
       "unit-type": "task",
       "content-type": "text"
     },
+    {
+      "target": "objective.html",
+      "source": "objective.md",
+      "label": "Objective",
+      "unit-type": "task",
+      "content-type": "text"
+    },
     {
       "target": "procedure.html",
       "source": "procedure.md",

experiment/aim.md

@@ -1,6 +1,3 @@
 
 Sols are those colloidal systems where a solid is dispersed in liquid. Sols have also been classified as lyophobic colloids. Lyophobic sols cannot be prepared by simple mixing of dispersed phase and the dispersion medium. Two special techniques are employed for the preparation of lyophobic colloids: broadly classified as ‘top-down ’ or ‘dispersion ’ methods and ‘bottom-up ’ or ‘condensation ’ methods. In ‘top-down ’ or ‘dispersion ’ methods, larger macro-sized particles are broken down to colloidal size. On the other hand, in ‘bottom-up ’ or ‘condensation ’ methods particles of colloidal size are produced by aggregation of atoms, ions or molecules. We shall follow the ‘bottom-up’ or ‘condensation’ method to prepare Fe(OH)3 colloid.  
 
-To study the change in the phenomenon of surface tension with addition of colloids to water.  
-
-

experiment/assignment.md

@@ -1,11 +1,11 @@
-**Pre-Experiment**
+**Pre-Assignment**
 
 1. What may happen if we add excess of HCl to Fe(OH)3 solution?  
 2. What is the role of FeCl3 electrolyte in the Fe(OH)3 sol formation via peptization method?  
 3. Can you prepare a sol of FeCl3 in water?  
 4. Does the peptization method of sol preparation fall under ‘top-down’ or ‘bottom-up’ method?  
 
-**Post-Experiment**
+**Post-Assignment**
 
 1. Name the method(s) by which you prepared Fe(OH)3 sol.  
 2. What are the building blocks of Fe(OH)3 sol?  

experiment/objective.md

@@ -0,0 +1,2 @@
+- To study the change in the phenomenon of surface tension with addition of colloids to water.
+