Add a Chemical Equation Problem

Tags: educator how-to

The chemical equation problem type allows the learner to enter text that represents a chemical equation into a text box. The system converts that text into a chemical equation below the text box. The grader evaluates the learner’s response by using a Python script that you create and embed in the problem.

Note

You can make a calculator available to your learners on every unit page. For more information, see Calculator Tool.

Create a Chemical Equation Problem

Chemical equation problems use MathJax to create formulas. For more information about using MathJax in Studio, see MathJax for Mathematics.

To create the above chemical equation problem, follow these steps.

1. In the unit where you want to create the problem, select Problem under Add New Component.

2. Select Advanced problem types. Then select Blank Advanced Problem.

3. In the component that appears, select Edit.

4. In the component editor, paste the code from below.

5. Select Save.

Sample Chemical Equation Problem Code

<problem>
  <startouttext/>
  <p>Some problems may ask for a particular chemical equation. Practice by writing out the following reaction in the box below.</p>

\( \text{H}_2\text{SO}_4 \longrightarrow \text { H}^+ + \text{ HSO}_4^-\)

  <customresponse>
    <chemicalequationinput size="50" label="Enter the chemical equation"/>
    <answer type="loncapa/python">

if chemcalc.chemical_equations_equal(submission[0], 'H2SO4 -> H^+ + HSO4^-'):
    correct = ['correct']
else:
    correct = ['incorrect']

    </answer>
  </customresponse>
  <p>Some tips:</p>
  <ul>
  <li>Use real element symbols.</li>
  <li>Create subscripts by using plain text.</li>
  <li>Create superscripts by using a caret (^).</li>
  <li>Create the reaction arrow (\(\longrightarrow\)) by using "->".</li>
  </ul>

  <endouttext/>

 <solution>
 <div class="detailed-solution">
 <p>Solution</p>
 <p>To create this equation, enter the following:</p>
   <p>H2SO4 -> H^+ + HSO4^-</p>
 </div>
 </solution>
</problem>

See also

Guide to Chemical Equation Problem XML (reference)

Maintenance chart

Review Date	Working Group Reviewer	Release	Test situation

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