Tell me about a trend right now ???

Advantages of Virtual Classroom
* Personalized learning: Students can learn at their own time and phase
* Long distance learning
* Enhances collaboration and communication
* Real-time teaching and learning
* Effective and efficient time management
* Gives students and teacher a worldwide exposure
* Accessed to everyone equally from anywhere and at anytime
* Affordable
* Introduces students and educators to education technology
* Comprehensive online tutorials
* Encourages digital and smart classrooms
* Improves Visualization

Disadvantages of Virtual Classroom
* No control over the students or classroom
* No control over the learning atmosphere or environment
* Virtual Classroom requires computers and internet access, which might not be at hand to everyone
* Expensive: Enrolling into online live class or courses can be costly
* Students lack real-time teaching experience
* The risk to the traditional student-teacher collaboration

This is the formula ph + poh = 14 11.8 + poh = 14poh = 2.6then to find concentration, the formula ispoh = -log[oh^-]2.6 = -log[oh^-][oh^-] = 2.5119×10^3 m