แบบฝึกหัดการคำนวณความเข้มข้นของสารละลาย ม.1
ชื่อ....................................................................................ชั้น..........เลขที่................
คำนวณความเข้มข้นของสารละลาย
1. สารละลายทองเหลืองประกอบด้วยสังกะสี
120 กรัม ละลายอยู่ในทองแดง 180 กรัม สารละลายทองเหลืองเข้มข้นร้อยละเท่าไหร่
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2. ต้องการเตรียมสารละลายเอทานอลเข้มข้น
20 % โดยปริมาตรจำนวน 500 ลูกบาศก์เซนติเมตร จะต้องใช้ เอทานอลจำนวนเท่าใด แล้วทำอย่างไร
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3.สารละลายโซเดียมคลอไรด์จำนวน 500 ลูกบาศก์เซนติเมตร
มีโซเดียมคลอไรด์ 30 กรัม สารละลายโซเดียมคลอไรด์มีความเข้มข้นร้อยละเท่าไหร่
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ชื่อ.........................................................................................................ชั้น..........เลขที่................
คำนวณความเข้มข้นของสารละลาย
1. ถ้านำน้ำตาลทรายมา 40
กรัมละลายน้ำให้เป็นสารละลาย 200 ลูกบาศก์เซนติเมตร สารละลายนี้มีความเข้มข้น ร้อยละเท่าใด
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2. เด็กชายธนาธิป ต้องการเตรียมสารละลายแอลกอฮอร์
โดยนำแอลกอฮอล์ 270 ลูกบาศก์เซนติเมตร
สารละลายที่เตรียมไว้มีความเข้มข้นร้อยละเท่าไหร่...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
3. สารละลายทองเหลืองประกอบด้วยสังกะสี 120 กรัม
ละลายอยู่ในทองแดง 180 กรัม สารละลายทองเหลืองเข้มข้นร้อยละเท่าไหร่
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