Thaum cov poov tshuaj ntxiv rau hauv dej, cov hlau melts thiab ntab. Nws txav mus sai heev rau saum npoo dej. Cov hydrogen ignites instantly. Cov hlau tseem raug tua hluav taws, nrog cov nplaim taws thiab cov nplaim lilac.
Yuav ua li cas thaum hlau hlau ua rau dej?
Potassium hlau reacts nrog dej muab potassium hydroxide thiab hydrogen gas.
Thaum cov hlau hlau tso rau hauv dej yuav muaj qhov tshwm sim yog tias qhov sib npaug sib npaug ntawm cov tshuaj tiv thaiv yog dab tsi?
Thaum cov hlau poov tshuaj tso rau hauv dej, ntau lub zog tso tawm raws li cov poov tshuaj hydroxide thiab hydrogen gas yog tsim nyob rau hauv cov tshuaj tiv thaiv: 2K(s) + 2H2O(l) → 2KOH(aq) + H2(g).
Yuav ua li cas thaum potassium reacts nrog dej?
K+H2O→KOH+H2(g): Zoo li lwm pab pawg 1 hlau, potassium reacts nkag nrog dej los tsim hydrogen gas.
Thaum poov tshuaj tiv thaiv nrog dej ces cov roj hloov pauv yog?
ABSWER: Hitrogen gas yog hloov zuj zus thaum cov poov tshuaj tiv thaiv nrog dej.