Question 10 A student sets up three test tubes and labels them A B C. Test Tube

Question

Question 10 A student sets up three test tubes and labels them A B C. Test Tube A is 1/3 filled with 0.5 HCl, Test Tube B is 1/3 filled with 1.0 HCl, Test Tube C is 1/3 filled with 1.5 HCl. A 1.00 cm piece of Mg is dropped into each test tube at the same time. Which tube will react the fastest and why? Answer: Test tube ________ because that tube contained the HCL in the __________ concentration. Write and balance the equation for the reaction: Put HCL first, then Mg. Question 11 Heat is often needed to get a reaction to have enough activation energy for effective collisions. A reaction that takes a large input of heat is called ___, and the amount of heat (in cal, kcal or joules) is written on the ________ side of the chemical equation. (input the word reactants or the word products. not right or left). Heat can also be given off in a reaction, even if it takes some activation energy to get the reaction started in the first place. A reaction that releases more heat than it takes in is called ____________, and the amount of heat (in cal. kcal or joules) is written on the __________ side of the chemical equation. (input the word reactants or the word products. not right or left) Question 12 Write and balance the equation for the reaction of vinegar (acetic acid) with sodium bicarbonate: ___________ HC2H3o2 + ________ _____________ -----> _____________ + ________ __________

Explanation / Answer

Q10. Test tube C will react faster, because the tube contained the HCl in the increased concentration.

2HCl(aq) + Mg(s) --------> MgCl2(aq) + H2(g)

Q11. (a) Endothermic reaction, reactants side

(b) Exothermic reaction, products side

Q12. CH3COOH + NaHCO3 ------> CH3COONa + H2CO3

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.