Rb. Tawm ntawm Li, Na, K thiab Rb, Rb reacts sai tshaj plaws nrog dej.
Yuav ua li cas nrog dej nrog tus nqi siab?
The alkali hlau (Li, Na, K, Rb, Cs, thiab Fr) yog cov hlau reactive tshaj plaws nyob rau hauv lub sij hawm lub sij hawm - lawv tag nrho cov hnov mob heev los yog txawm tawg nrog dej txias, ua rau muaj kev hloov pauv ntawm hydrogen.
Yuav ua li cas pab tau sai sai nrog dej?
Txhua tus alkali hlau hnov mob nrog dej txias. Hauv txhua qhov tshuaj tiv thaiv, cov roj hydrogen raug muab tawm thiab cov hlau hydroxide raug tsim. Qhov nrawm thiab kev ua phem ntawm cov tshuaj tiv thaiv nce ntxiv thaum koj nqis mus rau pawg. Qhov no qhia tau hais tias qhov reactivity ntawm cov hlau alkali nce thaum koj mus rau pawg 1.
Yuav ua li cas cov hlau hauv qab no tuaj yeem cuam tshuam nrog dej?
Metals xws li potassium thiab sodium hnov mob hnyav nrog dej txias. Nyob rau hauv cov ntaub ntawv ntawm sodium thiab poov tshuaj, cov tshuaj tiv thaiv yog nruj heev thiab exothermic uas cov evolved hydrogen tam sim ntawd catches hluav taws. Cov tshuaj tiv thaiv calcium uas muaj dej tsawg dua.
Cov roj twg tsim thaum sodium reacts nrog dej?
Cov tshuaj tiv thaiv ntawm sodium thiab dej tsim hydrogen gasthiab cua sov, uas tsis yog kev sib xyaw zoo!
