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Lahuste ülesanded

Lahuste ülesanded. Lahus=lahustunud aine+lahusti Lahuse mass - 100% Lahustunud aine mass - %-line konts. Segamisreegel. 1.lahuse mass •%+2.lahuse mass•%= =saadud lahuse mass•% (Kui lisatakse puhast ainet,siis puhas aine on 100%-line. Kui lisatakse lahustit(vett), siis see

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Lahuste ülesanded

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  1. Lahuste ülesanded

  2. Lahus=lahustunud aine+lahusti Lahuse mass - 100% Lahustunud aine mass - %-line konts.

  3. Segamisreegel 1.lahuse mass•%+2.lahuse mass•%= =saadud lahuse mass•% (Kui lisatakse puhast ainet,siis puhas aine on 100%-line. Kui lisatakse lahustit(vett), siis see on 0%-line (lahustunud ainet selles pole). Kui aurustatakse vett välja, siis – märk.)

  4. Lahuste ülesanded • Mitme %-line lahus saadi, kui 730g 19 %-lisele soolalahusele lisati 10 g sama soola? (20,1%) • Mitme %-line lahus saadi, kui 300g 20%-lisele lahusele lisati 260g vett? (10,7%) • Mitu g vett tuleks lisada 400g 12%-lisele sahharoosi lahusele, et saada 5%-line lahus? (560g )

  5. Mitu grammi suhkrut tuleb lisada 300 g 1%-lisele lahusele, et saada 2,6%-line lahus? (4,93g ) • Mitu grammi vett tuleks välja aurutada 2kg 10%- lise suhkrusisaldusega mahlast, et tekiks 16%-line lahus? (750g) • Mitme %-line lahus saadi, kui segati 740 g 15%-list ja 540g 21%-list lahust? (17,5%)

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