Ngā Tauira Pātai e Matapaki ana i te Ōrau Parakore
He mea nui te ōrau parakore, arā, te nui o te parakore o tētahi matū, i roto i ngā momo peka pūtaiao, inā koa te matū tātari, te matū rongoā, me te matū ahumahi. Ka matapakihia e tēnei tuhinga te ariā o te ōrau parakore, ā, ka whakaratohia he tauira me ngā whakamārama whānui kia pai ake ai te mārama o ngā kaipānui ki te tatau me te whakamahi i tēnei ariā i roto i ngā momo āhuatanga.
Te Mārama ki te Ōrau Parakore
Ko te ōrau parakore e tohu ana i te taumata parakore o tētahi matū i tatauhia hei ōrau o te papatipu o te matū parakore i roto i tētahi tauira. Ka taea te whakaatu i te ōrau parakore i roto i te whārite e whai ake nei:
\[ \text{Ōrau Parakore} = \left( \frac{\text{Taumaha o te matū parakore}}{\text{Taumaha o te tauira}} \right) \whakareatia ki te 100\% \]
Dimana:
– Ko te papatipu o tētahi matū parakore ko te papatipu o te matū e tika ana kia whakatauhia tōna parakore.
– Ko te papatipu tauira te papatipu katoa o te tauira kei roto ngā matū parakore me ō rātou poke.
Te Hiranga o te Ōrau Parakore
He mea nui te ōrau parakore i roto i te whānuitanga o ngā kaupapa pūtaiao me ngā tono. I roto i te matū tātari, ka pā te parakore o te matū matū ki ngā hua whakamātautau. I roto i te umanga rongoā, me whakapūmau te parakore o ngā rauemi mata mō ngā rongoā kia mau ai te haumaru me te whai huatanga o te hua whakamutunga. I roto i ētahi atu rāngai, pērā i te hanga whakarewa me te wahie, ka pā te parakore ki te kounga me te mahi o te hua.
Tauira o ngā Pātai Whakataki
Me tīmata tātou me tētahi tauira māmā noa iho i mua i te neke atu ki ngā raruraru uaua ake.
Tauira Pātai 1:
Ko te taumaha o tētahi tauira konumohe he 10 karamu. E whakaatu ana te tātaritanga ko te taumaha o te konumohe parakore i roto i te tauira he 9.5 karamu. He aha te ōrau parakore o tēnei matū?
Kōrero:
E mōhiotia ana:
– Te taumaha o te matū parakore = 9.5 karamu
– Papatipu tauira = 10 karamu
\[ \text{Ōrau Parakore} = \left( \frac{9.5 \text{ karamu}}{10 \text{ karamu}} \right) \times 100\% \]
\[ \text{Ōrau Parakore} = \left( 0.95 \right) \times 100\% \]
\[ \text{Ōrau Parakore} = 95\% \]
Nō reira, ko te ōrau parakore o te tauira konumohe he 95%.
Ngā Tauira Raru Uaua
Tauira Pātai 2:
He tauira 150 karamu tāu o te konupūmā kāponāte (\(\text{CaCO}_3\)). E whakaatu ana te tātaritanga he poke kei roto i te āhua o te konupūmā kāponāte (\(\text{MgCO}_3\)) tae atu ki te 10 karamu. Tātaihia te ōrau parakore o te konupūmā kāponāte i roto i te tauira.
Kōrero:
E mōhiotia ana:
– Papatipu tauira = 150 karamu
– Te taumaha o te poke (\(\text{MgCO}_3\)) = 10 karamu
Nō reira, ka taea te tatau i te papatipu o te matū parakore (\(\text{CaCO}_3\)) penei:
\[ \text{Taumaha o te matū parakore} = \text{Taumaha o te tauira} – \text{Taumaha o te poke} \]
\[ \text{Taumaha o te matū parakore} = 150 \text{ karamu} – 10 \text{ karamu} \]
\[ \text{Taumaha o te matū parakore} = 140 \text{ karamu} \]
Muri iho, tatauhia te ōrau parakore:
\[ \text{Ōrau Parakore} = \left( \frac{140 \text{ karamu}}{150 \text{ karamu}} \right) \times 100\% \]
\[ \text{Ōrau Parakore} = \left( 0.9333 \right) \times 100\% \]
\[ \text{Ōrau Parakore} \tata ki te 93.33\% \]
Nō reira, ko te ōrau parakore o te konupūmā kāponāte i roto i te tauira he tata ki te 93.33%.
Ngā Tauira o ngā Pātai Tono i roto i te Ahumahi
Tauira Pātai 3:
E whakaputa ana tētahi kamupene rongoā i te 200 kg o tētahi rongoā, ā, 98% te parakore. I te wā e tākaihia ana, e 5 kg o te rongoā kua poke. He aha te ōrau parakore o te rongoā i muri i te poke?
Kōrero:
E mōhiotia ana:
– Te taumaha tīmatanga o te rongoā = 200 kg
– Te ōrau parakore tuatahi = 98%
– Te papatipu tīmatanga o te matū parakore = \(\frac{98}{100} \times 200 \text{ kg} = 196 \text{ kg}\)
– Te papatipu poke tāpiri = 5 kg
– Te tapeke o te papatipu o te tauira i muri i te poke = 200 kg + 5 kg = 205 kg
Kāore te papatipu o te matū parakore e rerekē (196 kg), nō reira ko te ōrau o te parakore i muri i te poke ko:
\[ \text{Ōrau Parakore} = \left( \frac{196 \text{ kg}}{205 \text{ kg}} \right) \times 100\% \]
\[ \text{Ōrau Parakore} \tata ki te 95.61\% \]
Nō reira, ko te ōrau o te parakore o te rongoā i muri i te poke he tata ki te 95.61%.
Ngā Tauira Pātai mō te Whakamahinga o te Tātari Matū
Tauira Pātai 4:
I roto i tētahi tātaritanga matū o tētahi otinga, e mōhiotia ana he 2.5 karamu o tētahi matū parakore kei roto i te rōrahi katoa o te 3 rita o te otinga. Mena ko te mātotoru o te otinga he 1.2 karamu/mL, he aha te ōrau parakore o te matū kei roto i te otinga?
Kōrero:
E mōhiotia ana:
– Te taumaha o te matū parakore = 2.5 karamu
– Te rōrahi o te wairewa = 3 rita = 3000 mL
– Te mātotoru o te otinga = 1.2 g/mL
Mā te whakamahi i te mātotoru hei kimi i te papatipu katoa o te otinga:
\[ \text{Papatipu tauira} = \text{Rōrahi otinga} \times \text{Kōmato} \]
\[ \text{Taumaha tauira} = 3000 \text{ mL} \times 1.2 \text{ g/mL} \]
\[ \text{Papatipu tauira} = 3600 \text{ karamu} \]
Kātahi, tatauhia te ōrau parakore:
\[ \text{Ōrau Parakore} = \left( \frac{2.5 \text{ karamu}}{3600 \text{ karamu}} \right) \times 100\% \]
\[ \text{Ōrau Parakore} \tata ki te 0.0694\% \]
Nō reira, ko te ōrau parakore o te matū i roto i te otinga he tata ki te 0.0694%.
Te Katinga
He mea nui te tatau i te ōrau parakore o te kounga me te tātari matū. Mā te māramatanga hōhonu ki tēnei ariā ka taea e ngā tohunga i roto i ngā momo mara te whakarite i te kounga me te ōritetanga o ngā hua, ngā rauemi rānei e mahi ana rātou. Kua whakaatuhia e tēnei tuhinga ētahi tauira raruraru hei āwhina i ngā kaipānui ki te whakahōhonu ake i tō rātou māramatanga ki te whakamahi i te ariā o te ōrau parakore i roto i ngā horopaki rerekē.
