Morska sol

Za ovaj Earthcache morate potražiti morsku sol na velikom kamenju. Molimo vas da tamo idete samo kad je more mirno. Ako ne, previše je opasno. Svatko je odgovoran za svoje postupke.

Podrijetlo

Metalni (kationski) dijelovi morskih soli potječu od vremenskih utjecaja stijena. Minerali koji sadrže alkalne i zemnoalkalijske metale, koji se nalaze u magmatskim stijenama (posebno feldspatu), otapaju se u kišnici tijekom geoloških razdoblja. Tijekom ovog procesa otapanja minerali se dijele na ione. Na taj način ioni natrija i kalija (Na+, K+) dopiru do vodenih putova i na kraju do mora. Anionski dio soli u morskoj vodi, posebno klorid (Cl-), odgovoran za slani okus, vjerojatno ne dolazi isključivo od trošenja stijena, već je ispran iz primitivne atmosfere i već je bio prisutan u proto-oceanu u relativno visokoj koncentraciji.

Količina (masena koncentracija) soli otopljenih u određenoj količini morske vode naziva se salinitet. Salinitet otvorenog oceana je oko 3,5%. To znači da 1000 g - što odgovara 976 ml - morske vode sadrži 35 g otopljenih soli. Baltičko more sadrži u prosjeku 0,8%, Sjeverno more 3,0%, Sredozemno more 3,8%, a Mrtvo more 28% soli. Značajne razlike u salinitetu tih vodnih tijela proizlaze iz interakcije regionalne klime (vlažna naspram sušnih) i širine njihovih veza s otvorenim oceanom ili ako takva veza postoji (vidi također salinitet unutarnjih mora).

Dobivanje

Morska sol dobiva se samo na rubovima vodenih tijela s barem normalnim salinitetom oceana i tamo gdje postoje povoljni klimatski uvjeti barem sezonski (dovoljno visoke temperature, sunce, vjetar, vrlo malo oborina). Na tim obalama ili obalama voda iz mora ili iz jezera tradicionalno se kanalizira u umjetne i ravne ribnjake ili jezera, zvana salinas. Ovi ribnjaci često pokazuju intenzivno crvenu do ljubičastu boju zbog halofilnih bakterija koje vole sol. Isparavanjem vode pod utjecajem sunca i vjetra povećava se koncentracija soli u preostaloj tekućini (salamure). Kako se koncentracija povećava, salamura se prenosi sve dok zbog uklanjanja preostale vode ili njenog isušivanja ne ostanu slojevi kristalizirane soli. Radnici soli sakupljaju ovu sol mehanički ili ručno i čuvaju je u hrpe. Procjenjuje se da morska sol čini oko 30 posto svjetske proizvodnje soli, ostatak je kamena sol.

Pitati:

1. Potražite morsku sol u velikim stijenama. Ako ga pronađete, možete opisati gdje se nakuplja morska sol.

2. Možete li rukama ukloniti morsku sol s kamenja? (Ogrebe) Ako da, kakav je osjećaj i u kojoj se količini otapa?

3. Što mislite, koliko se morske soli u kilogramima može naći u stijeni? (Opišite iznos na temelju stijene koju odaberete)

4. Kako morska sol ulazi u ovo područje?

5. Neobavezno: Fotografirajte sebe ili predmet na kamenju s morem ili ruševinama u pozadini.

Pošaljite svoj odgovor na earth.alec2005@gmx.net ili izravno na moj profil. Možete se odmah prijaviti. Ako postoje greške, odmah me kontaktirajte i možemo ih zajedno ispraviti.

For this Earthcache, you need to look for sea salt on large stones. Please only go there when the sea is calm. If not, it's too dangerous. Everyone is responsible for their own actions.

Origin

The metallic (cationic) parts of sea salts come from the weathering of rocks. Minerals containing alkaline and alkaline earth metals, which are found in igneous rocks (especially feldspar), dissolve in rainwater during geological periods. During this dissolution process, minerals are divided into ions. In this way, sodium and potassium ions (Na+, K+) reach waterways and eventually the sea. The anionic part of the salt in seawater, especially chloride (Cl-), responsible for the salty taste, probably does not come exclusively from the weathering of rocks, but was washed out of the primitive atmosphere and was already present in the proto-ocean in a relatively high concentration.

The amount (mass concentration) of salts dissolved in a certain amount of seawater is called salinity. The salinity of the open ocean is about 3.5%. This means that 1000 g - equivalent to 976 ml - of seawater contains 35 g of dissolved salts. The Baltic Sea contains an average of 0.8%, the North Sea 3.0%, the Mediterranean Sea 3.8%, and the Dead Sea 28% salt. Significant differences in the salinity of these water bodies result from the interaction of regional climate (humid versus arid) and the breadth of their connections to the open ocean or if such a relationship exists (see also salinity of internal seas).

Getting

Sea salt is obtained only on the edges of water bodies with at least normal salinity of the ocean and where there are favorable climatic conditions at least seasonally (sufficiently high temperatures, sun, wind, very little precipitation). On these shores or shores, water from the sea or from lakes is traditionally channeled into artificial and flat ponds or lakes, called salinas. These ponds often show an intense red to purple color due to salt-loving halophilic bacteria. Evaporation of water under the influence of the sun and wind increases the concentration of salts in the remaining liquid (brine). As the concentration increases, the brine is transferred until layers of crystallized salt remain due to the removal of the remaining water or its drainage. Salt workers collect this salt mechanically or manually and store it in piles. Sea salt is estimated to account for about 30 percent of the world's salt production, the rest being rock salt.

Ask:

1. Look for sea salt in large rocks. If you find it, you can describe where the sea salt accumulates.

2. Can you remove sea salt from stones with your hands? (Scratches) If so, what does it feel like and in what amount does it dissolve?

3. How much sea salt in kilograms do you think can be found in a rock? (Describe the amount based on the rock you choose)

4. How does sea salt enter this area?

5. Optional: Take a photo of yourself or an object on rocks with the sea or ruins in the background.

Send your response to earth.alec2005@gmx.net or directly to my profile. You can sign up right away. If there are any errors, please contact me immediately and we can correct them together.