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Titrations of acids and bases, how do weak acids react with eachother?

what are the products for this equation HCN+HF=?

I would assume that it is NH2+CF, but due to electronegativity HF holds on to its proton, so I am unsure what the products would be, thanks for any help!

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Calculate the pH in a mixture of 10 ml 0.1 benzoic acid and 11 ml 0.1 M Naoh.

Calculate pH in in a mixture of 10ml 0.1M benzoic acid and 11 ml 0.1M Naoh.

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Balance eqn and write net ionic eqn

I can't for the life of me figure these problems out.  Question seems simple and straight forward but I run in to all kinds of problems when trying to solve.  

Question: Complete and balance the following molecular equations and then write the net ionic equation for each:

a) HBr(aq) + Ca(OH)2(aq) --->

b) Cu(OH)2(s) + HClO4(aq)---->

c) Al(OH)3(s) + HNO3(aq)------>

I looked at the answer key and it showed the answer for a) to be:

2HBr(aq) + Ca(OH)2(aq) ---> CaBr(aq) + 2H2O(l) Net ionic: H+(aq) + OH-(aq) ---> H2O(l).  Which doesnt even begin to make sense as the molecular equation is not even balanced and it yields CaBr ( how does that even happen Ca2+ and Br-?)

I'd greatly appreciate if someone could guide me in the right direction.  Too mind boggled at the moment to even continue.    

 

Via: (page 172 Pearson Custom Library Chemistry 101 text)

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Find the wt% KHP in an unknown via titration?

So in lab we had to find the wt% of KHP in an unknown (with another soluble salt). The wt% varies between 15-80%.

We used 0.1 M NaOH. 

I had 10.0216 g of unknown disolved in 250 mL of H2O. 

40 mL of the KHP solution took 29.90 mL NaOH and 29.85 mL NaOH to neutralize.

To find the wt%, this is my work

0.02990 L NaOH x 0.10mol/L NaOH = 0.002990 moles (of NaOH and KHP)

0.002990moles / 0.040 L = 0.07475m/L of KHP

0.07475moles x 204.218 g/mole = 15.265 g KHP / L

but because this was in 40 mL, I took 15.265 g x 0.04 = 0.610612 g/40 mL

and since it stared with 250 mL, I multiplied 0.6106 x (250/40) and got 3.81625 grams

3.816/10.0216 g  x  100 = 38.063 wt%

(and did the same for 29.85)

 

I'm just not sure if this is the correct way to do this. No one else that I've talked to has done it this way.

Any help would be appreciated!

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calculate the moles concept of the questions

1) 1 mole of sulphuric acid react with 1 mole of sodium carbonate to form salt, water and carbon dioxide.

write an equation?

 

ii) calculate the mass of the salt formedd when 10.6g of sodium carbonate are used in the reaction?

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Help with Identifying a Redox Reaction?

Okay, so the equation is as follows:

2KOH + K2Cr2O7 --> 2K2CrO4 + H2O

And my question is: 

Identify the oxidation numbers for each element in the equation. Then determine whether the equation describes a redox reaction. Justify your answer in terms of electron transfer. Describe the oxidation and reduction that occurs. 

I can figure out the oxidation numbers just fine. This is just confusing because I'm not sure if this is an acidic or basic solution, and I'm not sure how to describe the electron transfer in this equation. SOS!

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Determine a certain mass when given pH

I need to create a 1 L. solution at 5.16 pH from ammoniumbromide at 25 degress celcius.

Ka NH4+ = 5.4 x 10-10.

Can you help? :/

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how to neutralize a solution of KOH in water

My apologies to my high school chemistry teacher but after 30 years I have forgotten just about everything you taught me....

The company that I work for manufactures a HHO generating hydrolysis system that when full has 3 gallons of 28% potassium hydroxide in water. Periodically it must be drained and flushed, at the time of the draining the volume of the system can be at any level from nearly zero to three gallons. I must create a chart showing how much 5% vinegar to add to the solution to bring the PH to a neutral point (~7) for disposal. The expected PH of the system when full is ~ 14.

The easiest method would be to simply bring the solution back to three gallons and neutralize at that point but it will often result in creating more volume than desired as I expect most systems to be somewhat less that full.

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What is the significance of titrating to know molarity

Acetic Acid Titration from NaoH.

Answer: Molarity of Acetic Acid in Vinegar = 0.175

 

I need to write discuss and explain my results for my university laboratory report. What are key points I can make?

 

Thanks in advance. 

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Finding resulting ions after doing a neutralization reaction

How would you find the resulting ions after you have titrated a neutralization rxn. For example Mg(OH)2 + 2HCl= 2H2O+ MgCl2

Skill: 
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