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🏡Poland, Nysa: Dominika Lis, Emilia Wisła
🏖 Croatia, Buzet: Leona Petohlep, Jana Blažević
🌁 The Netherlands, Rotterdam: Erva Ciftci, Erin Yigit

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pH of rainwater will probably be the lowest in Rotterdam beacuse it’s bigger city, then in Nysa because of smog, and the highest in Buzet because in Buzet there is not a lot of big factories or smog.

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We collected the water in a jar.

According to the instructions, we sluiced the test tube three times with the tested water, then we filled it with a syringe up to 5 ml. After that, we added a few drops of indicator solution and stirred while waiting for a solid colour. After receiving it, we compared it with the colour scale of the indicator. This is how we determined its pH of 6,5, which is an acidic reaction typical of rain. This means that it is close to a neutral reaction - the Nysa rainwater is not very polluted, but the increasing and more significant presence of smog can have a negative impact on it.

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We filled laboratory glass with rainwater that we collected. Then we put cathode in rainwater,then we pressed the button on the pH meter and the results showed up.

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We put water into meter and we had a program on our laptop. Then we put USB into meter and then into computer which calculated pH value.

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Two measurements were carried out in the city centre.

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Area of study - Nysa city centre
Latitude - N 50°27'
Longitude - E 17°19'

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Table:

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Area of study:town centre

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Area of study:city centre

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🔵 In Nysa, Poland pH of rainwater is the most acidic because of the smog and a lot of factories.
🔵 Even though it's small, at the second place is Buzet, Croatia. It has factories which doesn't release very clean smoke.
🔵 Even though it's city with the biggest population of this three cities, Rotterdam is on the third place because of the fact, that their factories release cleaner smoke then the rest two cities - it's because of the chimney cleaners.

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The air could have been cleaner on that day due to the presence of wind, among other things which are connected to the weather.

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Do the reaserch results answer the reaserch question? 💦

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Do the reaserch results answer the reaserch question? 💦

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The presence of factories and smog in the city has a big influence on the rain pH. However, the results of pH measurements in these three cities differ very little - for two of them the rain has an acid reaction, only in Rotterdam it is alkaline.

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Material listed - Set for measuring the pH of water Aquatest:

pH reagent 4,5-9,0

pH reagent 6,0-8,0

syringe

test tube

colour scale

GLOBE materials used - GLOBE Protocol of hydrological tests

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Equipment for measuring pH of rainwater:
pH-meter
laboratory glass
rainwater

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Equipment for measuring pH of rainwater
laptop
USB