1) Potassium carbonate is more soluble in a) water b) ethanol 2) Phenolphthalein indicator is more soluble in a) water b) ethanol 3) Ethanol is separated as the......layer a) top  b) bottom 4) Water is separated as the.....layer a) top b) bottom 5) K₂CO₃ has.....character a) basic b) asidic 6) A mixture of ethanol and water has....hydrogen bonds compared with pure water a) more b) less 7) Zn + HCl → ZnCl₂ + H₂. The number of electrons transferred in this redox reaction are: a) 0 b) 1 c) 2 d) 3 8) During the cooling curve experiment, what does the region D represent, and what is the phase change occurring in this region? a) It represents the liquid phase. b) It represents the phase change from liquid to solid. c) It represents the phase change from solid to liquid. d) It represents the transition of water to ice

chemistry

โดย
สั่งพิมพ์
ฝัง

ลีดเดอร์บอร์ด

สไตล์ภาพ

ตัวเลือก

สลับแม่แบบ

คืนค่าการบันทึกอัตโนมัติ: ใช่ไหม