Milli- (symbol m) is a unit prefix in the metric system denoting a factor of one thousandth (10−3). Proposed in 1793 and adopted in 1795, the prefix comes from the Latin mille, meaning "one thousand" (the Latin plural is milia).

3 0

4 years ago

If 25.0 mL of 0.100 M Ca(OH)2 is titrated with 0.200 M HNO3, what volume of nitric acid is required to neutralize the base?

Troyanec [42]

Answer:

25 mL

Explanation:

The reaction that takes place is:

Ca(OH)₂ + 2HNO₃ → Ca(NO₃)₂ + 2H₂O

First we calculate how many Ca(OH)₂ moles were spent in the titration:

25.0 mL * 0.100 M = 2.5 mmol Ca(OH)₂

Then we convert Ca(OH)₂ moles into HNO₃ moles, using the stoichiometric ratio:

2.5 mmol Ca(OH)₂ * $\frac{2mmolHNO_3}{1mmolCa(OH)_2}$ = 5.0 mmol HNO₃

Finally we calculate the volume of required nitric acid solution, using the concentration:

5.0 mmol ÷ 0.200 mmol/mL = 25 mL

7 0

3 years ago

An organic acid is dissolved in methylene chloride (d=1.3 g/mL), which is then extracted with aqueous NaOH (d=1.0 g/mL). Will th

jenyasd209 [6]

Hey there!

Organic acid present in the methylene chloride when treated with aqueous NaOH it will be converted to aqueous soluble sodium carboxylate salt as shown below :

RCOOH (DCM layer) + NaOH ----------------> RCOONa (aqueous layer) + H₂O

the organic layer methylene chloride is immiscible with water, therefore it will present as two-layer, the large denser layer will present at the bottom

Density of dichloromethane = 1.325 g/mL

Density of water = 1 g/mL

Since dichloromethane density is more it will present at the bottom and water density is lesser, therefore, it will present its top, since RCOONa is aqueous soluble it present at the top aqueous layer

*Organic acid will present in the top layer

6 0

3 years ago

Which formula equation shows a reversible reaction?

pishuonlain [190]

Answer:2NaF is the correct one. It’s a simple combination and can be be split with relative ease

Explanation:

3 0

3 years ago

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