bro cậu không cần làm chỗ đấy đâu

sao khoa hoc 5

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Dưới đây là đặc điểm của dung dịch (theo hóa học phổ thông):

1. Đồng nhất

• Dung dịch là hệ đồng nhất: các thành phần (chất tan và dung môi) phân bố đều trong toàn bộ thể tích.
• Không thể quan sát được các hạt chất tan bằng mắt thường.

2. Kích thước hạt rất nhỏ

• Hạt chất tan trong dung dịch có kích thước rất nhỏ (< 1 nm).
• Chúng không bị lắng xuống theo thời gian.

3. Không lọc tách được bằng giấy lọc thường

• Chất tan không bị giữ lại khi lọc qua giấy lọc thông thường.
• Muốn tách phải dùng các phương pháp đặc biệt như bay hơi dung môi, chưng cất…

4. Ổn định

• Dung dịch không bị tách lớp hay lắng cặn khi để yên (khác với huyền phù hoặc nhũ tương).

5. Có tính chất của cả chất tan lẫn dung môi

• Dung dịch có thể dẫn điện (nếu chất tan là chất điện li).
• Có thể thay đổi điểm sôi, điểm đông đặc của dung môi…

6. Có tính chất phụ thuộc nồng độ

• Độ tan, áp suất hơi, nhiệt độ sôi, áp suất thẩm thấu… thay đổi theo nồng độ dung dịch

free fire

super man

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