Balancing Chemistry Equation JavaScript Simulation Applet HTML5

Balancing Chemistry Equation JavaScript Simulation Applet HTML5

https://iwant2study.org/ospsg/index.php/915-balancingchemeqns21-ionic
an original sim by Zenia

1. There are 3 different levels of increasing difficulty. (Level 1 - 3 questions, Level 2 - 4 questions, Level 3 - 3 questions).
2. The "hint" button is only enabled after students have made an attempt on the question (i.e. after clicking on "check" once). Upon answering a question correct, the next question will be shown. Students are able to toggle back and forth the questions they have attempted, but will not be able to proceed if they have not cleared the current question.
3. When students click "hint", reactant(s)/product(s) particle(s) that has/have the incorrect stoichiometric coefficient will be highlighted in red.
• particles highlighted in solid red lines - excess number of particles
• particles highlighted in dashed red lines - insufficient number of particles
4. There are 3 different views available for students - default, show chemical symbol and show charges
•  The default view shows the pictorial representation of particles, available for all 3 levels.
• "Show chemical symbol" is also available for all 3 levels, but it shows the chemical symbol of each particle (including charges of ionic compounds).
•  "Show charges" is only applicable to questions with ionic compounds (i.e. question 6 onwards). Its representation of ions is similar to that of 'dot-and-cross' diagrams.
5. For monitoring of student's progress, there are two yellow boxes found on the top left hand corner of the reactant and product boxes. It shows the log of student's answers.
• If an equation is balanced correctly, a green tick will appear on the side of the products panel.
• If an equation is balanced incorrectly, a red cross will appear on the side of the products panel.
•  If a student click on the "refresh" button in the simulation, the log will not reset. However, if the student was to refresh the browser, the log will automatically be refreshed as well.