Me te whakapau kaha ki te "kounga pai, tuku tere, utu kaha", kua roa mātou e mahi tahi ana me ngā kaihoko mai i tāwāhi me te motu, ā, e whiwhi ana mātou i ngā urupare pai mai i ngā kaihoko hou me ngā kaihoko o mua mō ngā tāpiringa kai waikawa acetic. E mihi ana mātou ki ngā hoa mai i ngā taumata katoa o te ao ki te rapu mahi tahi me te hanga i tētahi āpōpō ataahua ake, kanapa ake hoki.
Me te u tonu ki te "kounga pai, te tuku tere, te utu kaha", kua roa mātou e mahi tahi ana me ngā kaihoko mai i tāwāhi me te motu, ā, e whiwhi ana mātou i ngā urupare pai mai i ngā kiritaki hou me ngā kiritaki o mua. I te tirohanga whakamua, ka mau tonu mātou i te tere o te wā, ka haere tonu ki te hanga hua hou. Me tā mātou tīma rangahau kaha, ngā whare whakaputa matatau, te whakahaere pūtaiao me ngā ratonga tino pai, ka tukuna e mātou ngā hua kounga teitei ki ō mātou kiritaki puta noa i te ao. He mihi nui tēnei ki a koe kia noho hei hoa pakihi mō mātou, kia whai hua tahi ai mātou.














Ngā tāpiringa kai waikawa acetic Otinga tohu phenolphthalein
Whakarewahia te 1 karamu o te phenolphthalein ki roto i te 100 mL o te etanoru.
Te Tukanga mō ngā tāpiringa kai waikawa acetic:
Paunahia kia 2.5 karamu o te tauira kia tika te taumaha, kia 0.0001 karamu ki roto i tētahi pounamu kōniko kua taupokina kei roto ko te 50 mL o te wai kore-hauora. Tāpirihia kia 3 ngā pata o te otinga tohu phenolphthalein, ka titrate ki te titrant konutai hauwai (1 mol/L) kia puta rā anō he tae māwhero ngawari. Ko ia 1 mL o te titrant konutai hauwai (1 mol/L) he ōrite ki te 60.05 mg o te C₂H₄O₂. Ngā tāpiringa kai waikawa acetic.