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in samling fan 116,585,639 triemmen, dêr't elkenien oan bydrage kin.

It plaatsje fan hjoed
It plaatsje fan hjoed
Flowering trees at the bottom of the Eiffel Tower in Paris (France). Today is the March equinox, which marks the beginning of astronomical spring in the Northern Hemisphere.
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Mediatriem fan hjoed
Mediatriem fan hjoed
An experiment showing burning of sulfur in oxygen. A flow-chamber joined to gas washing-bottle (filled with solution of methyl orange) is being used. The product is sulfur dioxide (SO2) with some traces of sulfur trioxide (SO3). The 'smoke' that exits the gas-washing bottle is, in fact, a sulfuric acid fog generated in a reaction represented by:
SO3(g) + H2O(l) = H2SO4(aq).
The oxides are acidic, as can be witnessed by the colour change of the indicator.
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Baas ôfbylden

Commons hat ek in oersicht fan alderbêste ôfbylden.

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