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alexzavaleta775
20.11.2019 •
Chemistry
15.0ml of an unknown concentration of hcl reacts completely with 20.00ml of 1.0m naoh.determine the concentration of the acid
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Ответ:
molarity of NaOH = 1.0 M
Volume of NaOH = 20.00 mL in liters : 20.00 / 1000 = 0.02 L
Number of moles NaOH :
n = M * V
n = 1.0 * 0.02
n = 0.02 moles Of NaOH
Finally Molarity of the acid solution
Volume HCl : 15.0 mL in liters : 15.0 / 1000 = 0.015 L
1 HCl + 1 NaOH = 1 H₂O + 1 NaCl
1 mole HCl 1 mole NaOH
? mole HCl 0.02 moles NaOH
moles HCl = 0.02 * 1 / 1
= 0.02 moles of HCl
M ( HCl) = n / V
= 0.02 / 0.015
= 1.333 M of HCl
hope this helps!
Ответ:
SOLID- atoms are packed tightly together with little movement. Has a definite shape and volume.
LIQUID- atoms are packed loosely together with some movement. Has a definite volume but NO definite shape.
GAS- atoms are spread out with lots of movement. Has NO definite shape or volume.
ICE- when a liquid turns into a solid (freezing).
WATER- when a solid turns into a liquid (heat is added)
WATER VAPOR- when a liquid turns into a gas (boiling)
Hope this helped!