This time, we are studying the DO of water using Winkler's method. Basically, the reagents that we need are POISONs! Right, they are bad towards human body=P
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgiaJAkjFlDGzzqf1PcB2yxHGUCTDJSwS1Ds2YgEx4N-RSlRZYY0CuWYE9gUBdBFOD4KwzJKKNFDcND_LQsFluBCa6tHAa2d_axzI5PIXByaIh0h1mog4Orjqe3pSC7e9Imu9X1Vqr9nGI/s400/IMG_0056.jpg)
These are thrown tools. How wasting =.=... But I hope they recycled it somehow.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKwfH7gs9xzvm4h4FVvNIaOq5g9x1rlwie3tENJsT80bVIs1dD_pGSgXuO6zwHjsrqKrk6uIEapwx_i0YiyPHE8NH4DYRUtT2oaeQjW66Xxu28dZir9BvNCL1SrtGnd3MQ8SlUKVxkMTs/s400/IMG_0053.jpg)
Talking about wasting. There is more to come. We as students usually don't safe the cost for any experiment since we did paid for them.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEil25dCGKVcGmLb1734DiKOIRb16hgJq7hWwW_CHwELQMMvJEZCOT5A51tayS2glSFxXlSBUAAD-g1SWzkmG434QkuNSqXJ8qP5kTf7JPJsqpDqFwu2_w0l9pBoTPtaB0lQQ-OAgVlk4Lo/s400/IMG_0051.jpg)
This is our sample water obtained. It looks dirty and indeed it's not clean =P
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgbbpFB13FhkjPX5Mcryly4aLNxgiztqYXoGNPRlEuq5kEdLnqXm2A3O2UxztjUci768CS-wFthVDwJuAgKVnkumzNuS_2N-LVwwcrJ6IrfwQ8UNgo4EJsh6GMy02sTcDismUmiYs6Zat4/s400/IMG_0050.jpg)
Kok Sheng is the most hardworking member in my group. He did almost all the experiment.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjDraD7aEsb-HMiPpNd8aYMkmyWKAyruFmyj9vUHuV-O-ipqeqjxHME4ApjobluIUOPAwZk_5p59Vhig9bzlf3MnlEYW_JxmWXnj-Hgnjm12irrM2uchaf2EnzQovt_v98QZ10aVoPNxYU/s400/IMG_0058.jpg)
To understand DO in water is important so that we know if the water is safe for us human. Anyway, I'm the most lazy member today as I was just standing there doing nothing. Haha... Any question concerning this experiment, you can ask me^^
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