# College-Chemistry

NaOH(s)+ H2SO4(aq)=Na2SO4(aq) + H2O(l)

Consider the unbalanced equation above.A 0.900 g sample of impure NaOH was dissolved in water and required 37.0 mL of 0.145 M H2SO4 solution to react with the NaOH in the sample. What was the mass percent of NaOH in the sample?

1. 👍
2. 👎
3. 👁
4. ℹ️
5. 🚩
1. Balance the equation.
2NaOH + H2SO4 ==> Na2SO4 + 2H2O

moles H2SO4 = M x L = 0.145 x 0.037 = 0.005365
Now look at the equation. There are two moles NaOH for each mole H2SO4; therefore, moles NaOH titrated = 2 x 0.005365 = 0.01073

grams NaOH = moles x molar mass = 0.01073 x 40 (approximately--you use the more exact number) = 0.4292

%NaOH = (grams NaOH/mass sample)*100 = ??, then round to 3 significant figures.
Check my math.

1. 👍
2. 👎
3. ℹ️
4. 🚩
2. How do you get the mass of the entire sample?

1. 👍
2. 👎
3. ℹ️
4. 🚩

## Similar Questions

1. ### chemistry

When 25.0 mL of 1.0 M H2SO4 is added to 50.0 mL of 1.0 M NaOH at 25.0 °C in a calorimeter, the temperature of the aqueous solution increases to 33.9 °C. Assuming the specific heat of the solution is 4.18 J/(g·°C), that its

2. ### chemistry

A 43 mL sample of a solution of sulfuric acid is neutralized by 24 mL of a 0.053 M sodium hydroxide solution. Calculate the molarity of the sulfuric acid solution. Answer in units of mol/L. Here is my work so far. I thought I have

3. ### chemistry

A 25.0-mL sample of H2SO4 is neutralized with NaOH. What is the concentration of the H2SO4 if 35.0 mL of 0.150 M NaOH are required to completely neutralize the acid?

4. ### chemistry

A 0.205 g sample of impure NaOH requires 17.5 mL of 0.2180 M HCl for neutralization. What is the percent of NaOH in the sample, by weight?

1. ### Inorganic and Organic Chemistry

When solutions of H2SO4 and NaOH react, the balanced molecular equation is: H2SO4 (aq) + 2 NaOH(aq) Na2SO4(aq) + 2 H2O (I) How much Na2SO4 is obtained when 4.00 g of H2SO4 reacts with 4.00 g of NaOH?

2. ### Chemistry help

NaOH+H2SO4-> H2o+Na2SO4? How many moles of NaOH required to neutralize 1 mole H2SO4?

3. ### Chem

Which of the following is not an example of a neutralization reaction? A HCl + NaOH NaCl +H2O B 2 NaOH + H2CO3 Na2CO3 +2 H2O C H2SO4 + 2 NH4OH (NH4)2SO4 + 2 H2O D 2 AgNO3 + Zn 2Ag +Zn(NO3)2 A?

4. ### chem

An impure sample of (COOH)2 ·2 H2O that has a mass of 3.4 g was dissolved in water and titrated with standard NaOH solution. The titration required 42.7 mL of 0.156 molar NaOH solution. Calculate the percent (COOH)2 · 2 H2O in

1. ### LCM

H2SO4+NAOH=NA2SO4+H2O

2. ### chemistry

H2SO4(aq) + NaOH(aq)-> Na2SO4(aq) + H2O(l) Consider the unbalanced equation above. What is the concentration of the original sulfuric acid solution if 60.5 mL of the acid reacts with 18.0 mL of 0.110 M sodium hydroxide?

3. ### acid and base titrations

Which of the following solutions should be used when titrating a 25.00mL sample of CH3COOH that is approximately 0.1 M? a.) 0.150 M NaOH b.) 0.001 M NaOH c.) 3.00 M NaOH d.) 6.00 M NaOH

4. ### Chemistry

What is the net ionic equation when H2SO4 is neutralized by NaOH in aqueous solution? Write the molecular equation. H2SO4 + 2NaOH ==> Na2SO4 + 2H2O Convert to ions. 2H^+ + SO4^= + 2Na^+ + 2 OH^- ==> 2Na^+ + SO4^= + 2H2O Now cancel