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I'm not an expert teacher or lecturer of chemistry. I was only a student from SMA NEGERI 15 SURABAYA who had been one of the Bronze Medalist Participants of Olimpiade Sains Nasional X (2011) of Chemistry In Manado, North Sulawesi, 11 - 16 September 2011 and graduated in 2012. Now, I'm studying at Universitas Airlangga in Surabaya, Indonesia. I do love chemistry and I would like to help them who had difficulties in studying chemistry. That's why, please understand me if you found some misconcepts in my entries. Suggestions are always necessary in order to develop this blog. And I'm sorry because my English isn't so well.

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Saturday, March 31, 2012

Soal Latihan Persiapan IChO (Part V)

Oksida Nitrogen dengan Logam

Interaksi dari suatu HNO3 dengan suatu logam dapat menghasilkan berbagai macam produk seperti NO (salah satunya) dan lain - lain tergantung pada jenis logam, konsentrasi HNO3, dan lain - lain.

a. Tuliskan jenis nitrogen apa saja yang bisa terbentuk jika logam direaksikan dengan HNO3? Tulis persamaannya dan setarakan.

b. 1,000 gram sampel suatu logam dilarutkan pada HNO3 15% dihasilkan 446 mL (STP) campuran gas dan telah teranalisis bahwa massa gas A = 117 mg, gas B = 269 mg, dan gas C. Persentase massa nitrogen total A, B, dan C adalah 60,7 %. Diketahui persentase Nitrogen pada A = 100% dan B = 46,7 %. Tentukan gas A, B, dan C.

c. Logam apa yang direaksikan dengan HNO3 pada percobaan ini? Hitung Mr senyawa tersebut.

Collected by:
Putu Ivan Budi Gunawan
SMA Negeri 4 Denpasar

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