Na hodine ch\u00e9mie sme so \u017eiakmi vysk\u00fa\u0161ali zauj\u00edmav\u00fd pokus, ktor\u00fd uk\u00e1zal, ako m\u00f4\u017eeme pomocou pr\u00edrody zisti\u0165 kyslos\u0165 alebo z\u00e1saditos\u0165 r\u00f4znych l\u00e1tok. Ako pr\u00edrodn\u00fd indik\u00e1tor sme pou\u017eili v\u00fdluh z \u010dervenej kapusty.\u010cerven\u00e1 kapusta obsahuje farbiv\u00e1 naz\u00fdvan\u00e9 l\u00e1tky, ktor\u00e9 menia farbu pod\u013ea hodnoty pH. V kyslom prostred\u00ed sa sfarbuj\u00fa do \u010dervena , v neutr\u00e1lnom prostred\u00ed maj\u00fa fialov\u00fa farbu a v z\u00e1saditom prostred\u00ed prech\u00e1dzaj\u00fa do zelenej a\u017e \u017eltej farby.
My sme ako kyselinu pou\u017eili kyselinu citr\u00f3nov\u00fa , ktor\u00e1 sp\u00f4sobila sfarbenie roztoku do \u010dervena. Ako z\u00e1sadu sme pou\u017eili hydroxid v\u00e1penat\u00fd, pri ktorom sa farba zmenila na zelen\u00fa a\u017e \u017elt\u00fa. Tento jednoduch\u00fd experiment uk\u00e1zal, \u017ee aj be\u017en\u00e9 pr\u00edrodn\u00e9 l\u00e1tky m\u00f4\u017eu sl\u00fa\u017ei\u0165 ako chemick\u00e9 indik\u00e1tory.
Pokus \u017eiakov zaujal najm\u00e4 t\u00fdm, \u017ee zmeny farieb boli ve\u013emi v\u00fdrazn\u00e9 a pripom\u00ednali mal\u00fd \u201efarebn\u00fd pr\u00edrodn\u00fd \u00fakaz\u201c . Okrem pozorovania si tak mohli lep\u0161ie predstavi\u0165, \u010do znamen\u00e1 pH a ako rozli\u0161ujeme kyseliny a z\u00e1sady.<\/p>\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Na hodine ch\u00e9mie sme so \u017eiakmi vysk\u00fa\u0161ali zauj\u00edmav\u00fd pokus, ktor\u00fd uk\u00e1zal, ako m\u00f4\u017eeme pomocou pr\u00edrody zisti\u0165 kyslos\u0165 alebo z\u00e1saditos\u0165 r\u00f4znych l\u00e1tok. Ako pr\u00edrodn\u00fd indik\u00e1tor sme pou\u017eili v\u00fdluh z \u010dervenej kapusty.\u010cerven\u00e1 kapusta obsahuje farbiv\u00e1 naz\u00fdvan\u00e9 l\u00e1tky, ktor\u00e9 menia farbu pod\u013ea hodnoty pH. V kyslom prostred\u00ed sa sfarbuj\u00fa do \u010dervena , v …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[11],"tags":[],"class_list":["post-38918","post","type-post","status-publish","format-standard","hentry","category-aktualne"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.czslc.sk\/index.php?rest_route=\/wp\/v2\/posts\/38918","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.czslc.sk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.czslc.sk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.czslc.sk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.czslc.sk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=38918"}],"version-history":[{"count":1,"href":"https:\/\/www.czslc.sk\/index.php?rest_route=\/wp\/v2\/posts\/38918\/revisions"}],"predecessor-version":[{"id":38925,"href":"https:\/\/www.czslc.sk\/index.php?rest_route=\/wp\/v2\/posts\/38918\/revisions\/38925"}],"wp:attachment":[{"href":"https:\/\/www.czslc.sk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=38918"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.czslc.sk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=38918"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.czslc.sk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=38918"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}