General Chemistry Answers

calculate the number of grams of solute necessary to prepare the following solutions:

a. 25.0 m/ of a 0.200 N sulfuric acid solution in reactions that replace both hydrogen ions.

b. 50.0 m/ of a 1.25 N phosphoric acid solution in reactions that replace all three hydrogen ions.

How many grams of magnesium hydroxide are there in 125 m/ of 3.50 N solution?

How many milliliters of 0.35 N sulfuric acid are necessary to react with 30.2 m/ of 0.52 N sodium hydroxide)

If 0.825 g of pure sodium hydroxide is titrated with 24.7 m/ of hydrochloric acid solution to a methyl orange end point, calculate the molarity and the percent by mass (density of solution= 1.02 g/ m/) of the hydrochloric acid solution.

Vinegar is a dilute solution of acetic acid. In the titration of 10.0 m/ of vinegar, 19.5 m/ of 4.20 M sodium hydroxide solution was required to neutralize tge vinegar to a phenolphthalein end point. Calculate the molarity and the percent by mass (densitu of solution= 1.01 g/ m/) of acetic acid in the vinegar.

1. If 18.8 m/ of 1.25 M sodium hydroxide solution is necessary to netralized 25.0 m/ of a hydrochloric acid solution to a phenolphtalein end point, calculate the molarity and the percent by mass (density of solution= 1.02 g/ m/) of the hydrochloric acid solution.

Assume you have a 3.60 m solution that depressed the freezing point of the solution by 0.851 celcius. What is the molal freezing point depression constant (Kf) of the solution?

Mass of CuSO4● XH2O (g) = 1.6 grams BEFORE HEATING

After Heating :

Mass of H2O(g) = 1.1g

Mass of CuSO4 (g) : 0.5

QUESTION:

Use the information to calculate the number of moles of water lost and the number of moles in the anhydrous compound

The reaction 2 NO(g) ↔N₂(g) + O₂(g) has a Kc value of 2400 at 2000 K. If 0.850 M each of N₂ and O₂ are initially present in a 3.00-L vessel, calculate the equilibrium concentrations of N_O, N₂, and O₂.

At 25°c of kcl dissolves in 100cm³ of H2O to give a saturate solution. What's the solubility of this solution

a)g/dm³ of the solvent at this temperature

b)mol/dm³(k=39,cl=35.5)