SUMATIF TENGAH SEMESTER KIMIA (XI)
Quiz
•
Chemistry
•
11th Grade
•
Practice Problem
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Medium
laila maghfiroh
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25 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 4 pts
NaOH (Mr= 40) padat yang massanya 2 gram dilarutkan ke dalam air hingga volumenya 500 ml, maka konsentrasi ion H+ dalam larutan adalah ..
1 x 10-1 M
5 x 10-2 M
1 x 10-5 M
1 x 10-7 M
1 x 10-13 M
2.
MULTIPLE CHOICE QUESTION
5 mins • 4 pts
Asam HX 0,1 M mengalami ionisasi 1% milai tetapan ionisasi asam Ka HX adalah ..
2 x 10-5
1 x 10-2
1 x 10-5
2 x 10-6
1 x 10-4
3.
MULTIPLE CHOICE QUESTION
5 mins • 4 pts
air limbah pabrik yang diuji dengan indikator MO dan BTB berwarna kuning, dengan MR berwarna jingga, dan tidak berwarna dengan PP. perkiraan nilai pH air limbah tersebut adalah ..
PH < 4,4
PH > 4,4
PH > 6,0
PH < 6,0
4,4 < PH < 6,0
4.
MULTIPLE CHOICE QUESTION
5 mins • 4 pts
Apabila larutan CH3COOH 10-3 M (Ka = 1 x 10-5), ditetesi indikator MO, MR, BTB, dan PP. maka warna larutan berturut-turut adalah ..
Jingga-merah-kuning-tak berwarna
Merah-kuning-kuning-tak berwarna
Kuning-merah-kuning-tak berwarna
Merah-merah-biru-biru
Kuning-kuning-kuning-tak berwarna
5.
MULTIPLE CHOICE QUESTION
5 mins • 4 pts
Seorang peneliti sedang menguji sampel air sungai yang diduga tercemar limbah industri. Ia meneteskan beberapa indikator pH ke dalam sampel dan mendapatkan hasil sebagai berikut:
· Metil Oranye (MO) → Berwarna kuning
· Metil Merah (MR) → Berwarna jingga
· Bromtimol Biru (BTB) → Berwarna kuning
· Fenolftalein (PP) → Tidak berwarna
Berdasarkan hasil uji indikator, perkiraan pH air sungai tersebut adalah …
3-4
4-5
5-6
7-8
9-10
6.
MULTIPLE CHOICE QUESTION
5 mins • 4 pts
konsentrasi ion H+ yang terdapat dalam larutan H2SO4 0,10 M adalah ..
0,05 M
0,10 M
0,15 M
0,20 M
0,40 M
7.
MULTIPLE CHOICE QUESTION
5 mins • 4 pts
Cuplikan yang mengandung K2O (Mr = 94) dengan massa 18,8 g dilarutkan ke dalam air hingga volumenya 1 L. apabila 25 ml larutan tersebut dapat dinetralkan oleh 30 ml larutan H2SO4 0,1 M. maka kadar K2O dalam cuplikan tersebut adalah ..
95 %
90 %
80 %
60 %
40 %
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