Directions:Convert the following word equation into formula equations by changing element and compound names into chemical formulas. 1.Sodium+oxygen > sodium oxide

2.Copper+silver nitrate > copper(II)nitrate+silver

3.Aluminum chlorate+barium sulfate > aluminum sulfate+barium chlorate

4.Bromine+calcium iodide > calcium bromide+iodine

5.Zinc sulfide+magnesium arsenate > zinc arsenate+magnesium sulfide

6. Cobalt+lead(II) nitrate > cobalt(III)nitrite+lead

7.Potassium+water > potassium hydroxide+hydrogen

8.Lithium hydroxide+hydrogen acetate > lithium acetate+water

9.Ammonium chloride+nickel(II) chromate > ammonium chromate+ nickel(II) chloride

10.Phosphorus+oxygen > tetra-phosphorus decaoxide

when 25.0 ml of 0.700 mol/l naoh was mixed in a calorimeter with 25.0 ml of 0.700 mol/l hcl, both initially at 20.0 °c, the temperature increased to 22.1 °c. the heat capacity of the calorimeter is 279 j/°c.

the equation for the reaction is:

naoh + hcl → nacl + h₂o

moles of hcl = 0.0250 l hcl ×

0.700

mol hcl

1 l hcl = 0.0175 mol hcl

volume of solution = (25.0 + 25.0) ml = 50.0 ml

mass of solution = 50.0 ml soln ×

1.00

ml soln

= 50.0 g soln

δt=t2-t1

= (22.1 – 20.0) °c = 2.1 °c

the heats involved are

heat from neutralization + heat to warm solution + heat to warm calorimeter = 0

q1+q2+q3=0

nδh+mcδt+cδt=0

0.0175 mol ×

δh

+ 50.0 g × 4.184 j·g⁻¹°c⁻¹ × 2.1 °c + 279 j°c⁻¹ × 2.1 °c = 0

0.0175 mol ×

δh

+ 439.32 j + 585.9 j = 0

0.0175 mol ×

δh

= -1025.22 j

δh=1025.22j0.0175 mol= -58 600 j/mol = -58.6 kj/mol

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg