Chemistry, 29.12.2019 17:31 hokamidat

Can anyone tell me if this virtual titration lab is right & me find the missing concentrations ? ?

Can anyone tell me if this virtual titration lab is right & me find the missing concentrations

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Answer from: alani0720

Concentration is wrong, conc=moles/volume, both concentration are wrong use the formula to correct it.

Answer from: jacamron

The equation that you need to use is M₁V₁=M₂V₂ for both cases since the molar ratio is 1.

In titration 1:
You would use the equation M₂=M₁V₁/V₂

M₁=concentration of NaOH (0.1M)
V₁=volume of NaOH added (16mL)
V₂=volume of HCl in the Erlenmeyer flask (20mL)
M₂=concentration of HCl in the Erlenmeyer flask (unknown)

M₂=(0.1M*16mL)/20mL
M₂=0.08M
The concentration of acid was 0.08M

Titration 2:
Still use the formula M₂=M₁V₁/V₂

M₁=concentration of HCL (0.1M)
V₁=volume of HCl added (14mL)
V₂=volume of NaOH in Erlenmeyer flask (20mL)
M₂=concentration of NaOH in the Erlenmeyer flask (unknown)

M₂=(0.1M*14mL)/20mL
M₂=0.07M
concentration of the NaOH is 0.07M

I hope this helps. Let me know if you have any further questions or if anything needs to be clarified.

Answer from: Quest

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).

Answer from: Quest

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

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