A couple of weeks back Naomi asked if we could do some science experiments. Natually this strongly appealed to me, so we duly obliged. We had a go at learning how an airplane wing works
with a piece of paper,
seeing water surface tension in action, and making some bubbles by mixing acid and alkali. Here is the latter...
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiN1XiR-W9UPonFAKFlKayG37tBfqv2NvcY4xLjHxLIk4cQhBG6YdVSNOjDUwHd3Hm78DNTXKbjOhaE9oXKNODPRuWywRKY3FcTvHvb-khnLY1WcLXPtRYQ7wcdnR85XT4VqJg79q-h9ygK/s320/2017-05-14+14.36.00.jpg) |
Fill balloon with bicarbonate of soda (alkali) |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjL2q7PZVyC1U5DtlaR6ckWkIS4kymOIVD7g1Lrt9qfO0nq1Nz0722HKLMvbZEFKONTU1ei-_OFyaPFHhq0JPeeP_A6DtKi_bDv79uSSsGTWtEzvdvHJEkH6gXcULs6PrsHDhLqdJT_X3NY/s320/2017-05-14+14.36.02.jpg) |
fill bottle with vinegar (acid) |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgPYGlQYbKRFafEYBsnMePTbf2XQIp-kQSIvTw2ImHbEVKM6ijmFxHkRgsUPgzR7k8ZvQHisLos6TeEHUJDI4TLdzoMT7PKXf-6ZGxRTsyvD-_ifcCPe8OirinK5sRPLgIU9erXrDcAzDGm/s320/2017-05-14+14.37.39.jpg) |
seal balloon onto bottle, and pour alkali into acid |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg46oCmC2HilEJEQNqPQUGk5stdz9TXK2UpMFV-TwSSqjlm8ozgdOgPpvVjB74GEgnZBwgUNSE_2W2mF5Z6tSkTeOZcZRY44SGgdaeCcJWrvxlc4PDBjn0sjXQ6q3t2KNsLVIehrfzqW8jH/s320/2017-05-14+14.37.45.jpg) |
the reaction makes carbon dioxide, which makes bubbles and blows up the balloon |
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