Homework Help: Chemistry

Posted by T on Saturday, December 1, 2012 at 4:43pm.

Antacid tab is dissolved in water and a few drops of phenolphthalein is added yielding bright pink solution. 0.2025 M HCl added until pink color disappears. The 0.2147 M NaOH added until it turns light pink for ~30 seconds.
mass on antacid tablet = 1.056g
initial V 0.2025 M HCl = 1.97 mL
final V of 0.2025 M HCl = 42.26 mL
initial V of 0.2137 M NaOH = 0.89 mL
final V 0.2147 M NaOH = 17.32 mL
How many millimoles of acid are neutralized per antacid tablet and per gram of antacid tablet?
So I have 40.29 mL HCL used and
16.43 mL NaOH used.
I don't know where to go from there.

Chemistry - DrBob222, Saturday, December 1, 2012 at 4:58pm
millimols HCl initially = M x mL = ? = mmols to more than neutralize the antacid.
mmols NaOH added to neutralize the excess HCl = M x mL = ?
mmols HCl - mmol NaOH = mmols HCl used to neutralize the anacid tab. That answers the first question.
The second is mmols HCl/1.056g = ? which gives the second answer.

Answer this Question

Related Questions

chemistry - an impure sample of oxalic acid C2O4H2, with a mass of 0.465g, is ...
difficult chemistry - 100 Liters of air at STP is slowly bubbled through 200ml ...
chem1151 - please me solve During an experiment to measure the efficacy of an ...
chem - Help with this one please? If you place a piece of blue litmus paper in ...
Chemistry -help - To determine the sodium carbonate content & total alkali ...
Chemistry - How would each of the following affect the accuracy of the ...
acid-base titrations - For each of the following circumstances, indicate whether...
chemistry - A student is given 3 beakers: Beaker 1- 50.0 ml of a solution ...
Chemistry - We conducted a lab with antacids in class the other day and i'm ...
science - when phenolphthalein is added to ammonium hydroxide the color of the ...

For Further Reading

First Name:
School Subject:
Answer: