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File:36. Реакција на натриум со вода.ogv

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Description
Македонски: Мало парче натриум се става во епрувета во која има вода. Епруветата е поставена во сад со вода заради безбедносни причини. Кога парчето метал доаѓа во контакт со водата започнува реакција која е побурна во однос на реакцијата на литиум со вода. Добиениот гас се пали со запалка и тој гори со жолтопортокалов пламен.

Реакција на натриум со вода: 2Na(s) + 2H2O(l) = 2NaOH(aq) + H2(g)

Горење на водород: H2(g) + ½O2(g) = H2O(g)

Кон реакционата смеса се додаваат неколку капки фенолфталеин. Бојата на индикаторот се менува во малиновоцрвена што укажува дека е добиено соединение со базни својства (натриум хидроксид, NaOH).

Осмислено и изведено од Марина Стојановска, Миха Буклески и Владимир Петрушевски, Институт за хемија, ПМФ, УКИМ, Скопје.
English: A small piece of sodium metal has been cut and added to a test tube filled with water. The test tube is placed in a jar with water for safety reasons. When the metal touches the water a reaction more vigorous then the one with lithium and water, takes place. The generated gas is lighted by a lighter and it burns with a yellowish orange flame.

Reaction of sodium with water: 2Na(s) + 2H2O(l) = 2NaOH(aq) + H2(g)

Hydrogen burning: H2(g) + ½O2(g) = H2O(g)

Few drops of phenolphthalein are added to the reaction mixture. The color of the indicator turns raspberry red indicating that a compound with basic properties (sodium hydroxide, NaOH) has been formed.

Planned and performed by Marina Stojanovska, Miha Bukleski and Vladimir Petruševski, Department of Chemistry, FNSM, Ss. Cyril and Methodius University, Skopje, Macedonia.
Date
Source Own work
Author Карас Студио

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22 January 2020

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