A9.0 milliliter sample of hcl solution is exactly neutralized by 6.0 milliliters of a 3.0 m naoh solution. what is the concentration of the hcl solution

The correct answer is 2.0 M

Explanation:

The equation for the reaction is

HCl + NaOH ⇒ NaCl + H₂O

The formula to be used for the question is

CaVa ÷ CbVb = na ÷ nb

where Ca is the concentration of the acid, HCl (which is unknown)

Cb is the concentration of the base, NaOH (3.0M)

Va is the volume of the acid, HCl (9 ml)

Vb is the volume of the base, NaOH (6 ml)

na is the number of moles of the acid (from the equation above, there is 1 mole of HCl)

nb is the number of moles of the base (from the equation above, there is 1 mole of NaOH)

Hence,

Ca × 9/ 3 × 6 = 1/1

Ca = 3×6×1/9×1

Ca = 2 M

The concentration of the acid is 2.0 M

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )