Answer Posted / ahmed salah

bec it is arranged to acidic and alkaline

What is the purpose of adding urea?

898

---

Why is mercuric chloride added?

654

---

What is the unit of ph?

620

---

Why titration in which hcl and h2so4 is use?

596

---

What is modern definition(iupac) of ph?

724

---

---

Define Vulcanization?

713

---

What is fluidity of a liquid?

637

---

How is hardness of water caused?

654

---

What is kentchin? Is it real?

636

---

Why is acetone used for cleaning viscometer?

885

---

How is arsenic produced?

656

---

What is chemical oxygen demand?

602

---

What is the chemical formula of alum?

599

---

What is the prime constituents of cement?

742

---

Differentiate between modern periodic table and mendeleevs table?

675

---