We can try to have an interactive activity to learn about pH, base and acid. Using the indicator, mixing acid, base to move the indicator (any idea is welcomed)...
some doc: https://web.archive.org/web/20191109211320/http://www.thesciencesite.co.uk/chemistry/acids-and-alkalis/
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@jjazeix @echarruau Hii, i was thinking on working on this activity as a part of my gsoc 2019 project if given a chance, I have prepared a proposal regarding it, please have a look https://docs.google.com/document/d/1n8cIcyAu1JpeSjr4-UGmUT5HA0TPtKNh0t2X2eCa_rQ/edit?usp=sharing , once it is reviewed i can include its content in my main proposal
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@AkshayCHD we have a page on information we want to have for gsoc proposal, please check it: https://gcompris.net/wiki/GSOC_newcomers. We will only give feedback on "full" proposals, not parts.