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In the laboratory you dissolve 23.4 g of sodium fluoride in a volumetric flask and add water to a total volume of 375 mL.
What is the molarity of the solution? ___________M.
What is the concentration of the sodium cation? __________M.
What is the concentration of the fluoride anion? _______ M.
In the laboratory you dissolve 20.9 g of copper(II) iodide in a volumetric flask and add water to a total volume of 500 mL.
What is the molarity of the solution? ________M.
What is the concentration of the copper(II) cation? ________M.
What is the concentration of the iodide anion? ________M.
The use of hydrofluoric acid for etching and frosting of glass is based on the fact that it attacks glass, silicon dioxide. Silicon tetrafluoride and water are produced.
SiO2 + 4 HF → SiF4 + 2 H2O
a. Write the mode of action.
b. Calculate the number of moles of hydrofluoric acid would completely react with 2.5 moles of silicon dioxide
In the laboratory you dilute 3.28 mL of a concentrated 6.00 M hydrochloric acid solution to a total volume of 150 mL. What is the concentration of the dilute solution?
__________M
You wish to make a 0.284 M hydrochloric acid solution from a stock solution of 6.00 M hydrochloric acid. How much concentrated acid must you add to obtain a total volume of 175 mL of the dilute solution?
______________M
In the laboratory you dilute 5.27 mL of a concentrated 12.0 M nitric acid solution to a total volume of 50.0 mL. What is the concentration of the dilute solution?
______ M
Write the net ionic equation for the following molecular equation.
- ZnI2(aq) + Na2CO3(aq) ZnCO3(s) + 2NaI(aq)
Be sure to specify states such as (aq) or (s).
If a box is not needed leave it blank.
If no reaction occurs leave all boxes blank and click on "Submit".
Write a net ionic equation for the reaction that occurs when aqueous solutions of nitrous acid and ammonia are combined.
Be sure to specify states such as (aq) or (s).
If a box is not needed leave it blank.
If no reaction occurs leave all boxes blank and click on "Submit".
Write a net ionic equation for the reaction that occurs when aqueous solutions of hydrochloric acid and ammonia are combined.
Be sure to specify states such as (aq) or (s).
If a box is not needed leave it blank.
If no reaction occurs leave all boxes blank and click on "Submit".
Write a net ionic equation for the overall reaction that occurs when aqueous solutions of carbonic acid and potassium hydroxide are combined. Assume excess base.
