H2SO4 ve NaOH Nötrleşme Tepkimesi
ChemistryAcid-Base TitrationOrtaYKS
Yayınlanma:
Soru
7. pH değeri 1 olan $H_2SO_4$ çözeltisinin 200 mL'sini tamamen nötrleştirmek için kütlece % 10'luk NaOH çözeltisinden kaç gram kullanılmalıdır? (NaOH : 40 g/mol) A) 0,8 B) 1,6 C) 4 D) 8 E) 16
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Adım Adım Yazılı Çözüm
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Adım 1
Merhaba EMİNE, bu asit baz titrasyonu sorusunu birlikte çözelim.
Titrasyon ve Nötrleşme
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Adım 2
Tam nötrleşme gerçekleştiğinde, asitten gelen hidrojen iyonlarının mol sayısı, bazdan gelen hidroksit iyonlarının mol sayısına eşit olmalıdır.
$$n_{H^+} = n_{OH^-}$$
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Adım 3
Önce elimizdeki pH değerinden asit çözeltisindeki hidrojen iyonu derişimini bulalım. pH bir ise, hidrojen iyonu derişimi on üzeri eksi bir yani sıfır virgül bir molar demektir.
$$pH = 1 \Rightarrow [H^+] = 10^{-1} \text{ M} = 0,1 \text{ M samples/s}$$
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Adım 4
Şimdi hidrojen iyonlarının mol sayısını hesaplayalım. Derişim ile hacmi çarpıyoruz. İki yüz mililitreyi sıfır virgül iki litre olarak alıyoruz.
$$n_{H^+} = [H^+] \cdot V_{asit}$$
$$n_{H^+} = 0,1 \cdot 0,2 = 0,02 \text{ mol samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s samples/s 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Adım 5
Kuralımıza göre bazdan gelmesi gereken hidroksit iyonu mol sayısı da sıfır virgül sıfır iki olmalıdır. Sodyum hidroksit tek hidroksitli bir baz olduğu için, sodyum hidroksitin kendisinin de mol sayısı sıfır virgül sıfır iki moldür.
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