# Molar Solutions - NaOH

Please show steps and provide a short explanation.

The formula weight of NaOH is 40.0.

1. How many grams of NaOH are needed to make 1M solution?

2. How many grams of NaOH are needed to make a 0.5M solution?

3. How many grams of NaOH are needed to make 0.25M solution?

4. How many grams of NaOH are needed to make 500mL of 1.0M solution?

5. How many grams of NaOH are needed to make 100mL of 1.0M solution?

6. How many grams of NaOH are needed to make 10mL of 0.2M solution?

https://brainmass.com/chemistry/stoichiometry/molar-solutions-naoh-500034

#### Solution Preview

Steps in finding the mass of solute needed to prepare a solution of certain molarity:

a) Solve for the mole of solute needed.

The following working equation is useful:

Molarity = M = mole solute / volume of solution in liter

Hence,

Mole solute = Molarity x volume of solution in liter

b) Compute for the mass in gram of the solute needed.

Mass of solute in gram = mole solute x molar mass of the solute

1. How many grams of NaOH are needed to make 1M solution?

Note: Since the volume of the solution to be prepared is not specified, let us assume a volume of 100 ...

#### Solution Summary

Molar solution NaOH are examined in the solution.

Solutions, Precipitations, and Balancing Equations

1 - Presuming that these molecules are soluble, tell what ions are "produced" upon dissolving.

Rb2SO4 NaC 2H3O 2 AlCl3

2 - Calculate the molarity of

13.2 g of NaOH dissolved in 250 ml of water

27 g of C6H 12O6 in 400 ml of water

3 - How many grams of BaCl2 would you need to make 200 ml of a 0.75 M solution ?

4 - If acetic acid is being stored as a 6M solution, how many ml would you need to make up 200 ml of a 0.17 M solution ?

5 - What mass of aluminum hydroxide can be made from 50 ml of 0.25M Al(NO3)3 and 100 ml of 0.1 M KOH?

6 - What if any precipitate will form from the mixing of these pairs of solutions ?

MgCl2 & AgNO3 KCl & (NH4)2SO4

7 - Na2CO3 + Pb(NO3)2

a. What ions do these split into in water

b. Write a balanced molecular equation

c. Write a complete ionic equation

d. Write a net ionic equation

8 - Write a molecular equation and a net ionic for the combining of (NH4)2S and CoCl2

9 - Complete and balance the following acid-base reactions

HCl + Ca(OH)2 ----->

H2SO4 + Sr(OH)2 ----->

10 - Write a balanced equation for the reaction of sodium bicarbonate and hydrochloric acid

11 - Assign oxidation states for each element

H2

MnO2

MnO4-

HCO3-

SCl5

12 - Fe2O3 + 3 CO -----> 2 Fe + 3 CO2

Identify the atoms that are oxidized and reduced and ID the oxidizing agents and the reducing agents.

13 - What volume of 0.150 HNO3 solution is need to neutralize 25.0 ml of 0.103 M NaOH?

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