August 2018 1 60 Report
Mau tanya kimia,,, tolong dijawab ya,,
1. jika diketahui Kb NH4OH = 10^-5 dan Ka HNO2 = 10^-4, tentukan harga pH larutan NH4NO2 0,01 M!
2. hitunglah massa garam CH3COONa yang harus dilarutkan ke dalam 200 ml air agar diperoleh larutan garam dengan pH 10 ! ( Ka CH3COOH = 1 x 10^-5, Ar : C = 12, H = 1, O = 16, dan Na = 23)
3. sebanyak 5,35 gram garam NH4Cl dilarutkan dalam air hingga volumenya tepat 250 ml. jika diketahui Kb NH4OH = 1 x 10^-5, Ar : N = 14, H = 1, dan Cl = 35,5, tentukan pH larutan garam tersebut!

Terima Kasih :)

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