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2 years ago

Suppose that a formic acid (hcooh) solution has a ph of 3.15. which of these substances would increase the ph of the solution?

Chemistry

1 answer:

grin007 [14]2 years ago

6 0

NaCHO would increase the ph of the solution

NaBr and KCl are neutral substances that cannot change the pH of the formic acid solution.

Since HCl is a potent acid, adding more of it will cause the pH of the solution to decrease even more. Regarding NaCHO, it stands for sodium citrate, which is a weak base. NaCHO can thereby increase the pH of the formic acid solution.

There are many different ways to define acids and bases. According to the bronsted-Lowry definition, a base is a proton acceptor, whereas an acid is a proton giver. According to Lewis, an acid is an electron pair acceptor, whereas a base is an electron pair giver.

Learn more about Acid and base here:

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3 years ago

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BlackZzzverrR [31]

Answer:

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General Formulas and Concepts:

Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
Reading the Periodic Table
Writing Compounds
Using Dimensional Analysis

Explanation:

Step 1: Define

6.7 × 10²⁴ molecules NO₂ (Nitrogen dioxide)

Step 2: Define conversions

Avogadro's Number

Molar Mass of N - 14.01 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of NO₂ - 14.01 + 2(16.00) = 46.01 g/mol

Step 3: Use Dimensional Analysis

$6.7 \cdot 10^{24} \ molecules \ NO_2(\frac{1 \ mol \ NO_2}{6.022 \cdot 10^{23} \ molecules \ NO_2} )(\frac{46.01 \ g \ NO_2}{1 \ mol \ NO_2} )$ = 511.901 g NO₂

Step 4: Check

We are given 2 sig figs. Follow sig fig rules.

511.901 g NO₂ ≈ 510 g NO₂

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3 years ago

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