com/ibiscms/mod/ibis/view.php?id 4875175 Jump to.. 4/8/2018 09:00 PM Calculator

Question

com/ibiscms/mod/ibis/view.php?id 4875175 Jump to.. 4/8/2018 09:00 PM Calculator 0/10 Gradel Periodic Table Question 1 of 10 Sapling Learning ???? The concentration of HCl can be determined by titration with a primary standard such as NaCOs (sodium carbonate). The titration reaction is CO: +2H. ? H2O + CO2 What is the concentration of HCI if 28.1 mL of HCI was needed to to react with 0.541 g of Na COs to reach the end point? Number ) Previous Give Up & View Solution ?Check Answer ONext tl Exit about us careers privacy policy terms of use contact us heilp

Explanation / Answer

Ans 1

Mass of Na2CO3 = 0.541 g

Moles of Na2CO3 = mass/molecular weight

= 0.541/105.988

= 0.0051 mol

HCL is a strong acid

All HCL will react with Na2CO3 in the stoichiometric proportion

1 mol Na2CO3 reacts with = 2 mol of HCl

1 mol CO3(-2) reacts with = 2 mol of H+

0.0051 mol CO3(-2) reacts with = 2 x 0.0051

= 0.0102 mol of H+

Concentration of HCl = moles/Volume

= 0.0102 mol / 0.0281 L

= 0.363 M

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.