For the lab we just did in class, one of the questions wants to know what the molarity of the NaOH is for each of the 'trials' of titration we did. The only problem with this is that the only number given to me was that of the amount we used! (11.29 mL for the first)! Is it even possible to figure out an answer from there?!
Usually you have mL NaOH but you also know how many mL of the acid and the molarity of the acid. With no more information than mL NaOH, no, it can't be done.
fabulous. thanks EVER so much for the intelligent help--you know, you should get a teaching degree.
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I have never understood people who "bite the hand that feeds them." =(
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Yes, it is possible to calculate the molarity of NaOH (sodium hydroxide) from the given information. To do so, you also need the volume of the solution you titrated and the balanced chemical equation for the reaction.
Here's how you can calculate the molarity of NaOH from the amount used (11.29 mL):
1. First, you need to convert the volume of NaOH used to liters. Since 1 mL is equal to 0.001 L, you can convert 11.29 mL to 0.01129 L.
2. Next, use the balanced chemical equation to determine the stoichiometric ratio between NaOH and the substance being titrated. For example, if you were titrating with hydrochloric acid (HCl) and the equation is:
NaOH + HCl → NaCl + H2O
The stoichiometric ratio is 1:1, meaning one mole of NaOH reacts with one mole of HCl.
3. Determine the number of moles of NaOH by using the stoichiometric ratio calculated in step 2. Since the stoichiometric ratio is 1:1, the number of moles of NaOH is the same as the number of moles of the substance being titrated.
4. To calculate the molarity (M) of NaOH, use the formula:
M = moles of NaOH / volume of NaOH (in liters)
Substitute the moles of NaOH determined in step 3 and the volume of NaOH (in liters) from step 1 into the formula to calculate the molarity.
Remember to repeat this process for each trial separately, as the volumes required for each trial may be different.
By following these steps, you can calculate the molarity of NaOH for each trial based on the given amount used.