fullsteam

Thanks so much, yes I was worried it may not be a strong enough solution, for example of someone had only been infected once and had just 3ml of bicarb sol. in their test tube. I will certainly test first. I loved the idea, gsk education website is fantastic - loads of ideas!

Thank you for your replies, to be honest I was mostly concerned about the warnings regarding inhalation.Though as you rightly point out, it will only be a drop or two and I won't be handing over the bottle to any of the children anyway! It looks like it may be easier to get hold of Methyl Orange - does anyone have any opinions on this as an indicator? Ah also, you won't be able to access that link above as I think you need to be signed in to the site...the experiment is to show how malaria spreads. I give the kids test tubes at the start of the session, all but one have distilled water in. One has bicarb added, but they don't know which. Each student takes a pipette from someone else's tube and deposits in another. This carries on and at the end I reveal how many were infected at the start...then use the indicator to show who is infected now. Hope this makes sense!

Hello, I'm new. I am running a STEM club with a group aged 8-10 years and we are hoping to this experiment from gsk https://www.gskscienceeducation.com/media/412926/Fighting_back_Lab_Infectionindd-1-.pdf#ga-track . I was looking to buy Universal Indicator but it seemed very expensive just for the sake of one session, so started to look for Phenolphthalein. However upon reading the safety sheet I was taken aback by all the warnings! I then noticed the same about the universal indicator. I would like to use a liquid rather than indicator strips as I just think the "effect" will be better. But I am concerned about safety issues so can someone please advise which is best from the following: Phenolphthalein Universal Indicator solution Methyl Orange solution? Note, as you can tell I am NOT a Science teacher! Any suggestions welcomed!