E sure to answer all parts. Calculate the pH of the following aqueous solutions at 25°C: (a) 9.5 × 10−8 M NaOH (b) 6.3 × 10−2 M LiOH (c) 6.3 × 10−2 M Ba(OH)2

(a) 7.0

(b) 12.8

(c) 13.11

Explanation:

(a)

NaOH is a strong base with 1 OH⁻. If [NaOH] = 9.5 × 10⁻⁸ M, then [OH⁻] = 9.5 × 10⁻⁸ M.

The pOH is:

pOH = -log [OH⁻] = -log 9.5 × 10⁻⁸ = 7.0

The pH is:

pH = 14 - pOH = 14 - 7.0 = 7.0

(b)

LiOH is a strong base with 1 OH⁻. If [LiOH] = 6.3 × 10⁻² M, then [OH⁻] = 6.3 × 10⁻² M.

The pOH is:

pOH = -log [OH⁻] = -log 6.3 × 10⁻² = 1.2

The pH is:

pH = 14 - pOH = 14 - 1.2 = 12.8

(c)

Ba(OH)₂ is a strong base with 2 OH⁻. If [Ba(OH)₂] = 6.3 × 10⁻² M, then [OH⁻] = 2 × 6.3 × 10⁻² M = 0.13 M

The pOH is:

pOH = -log [OH⁻] = -log 0.13 = 0.89

The pH is:

pH = 14 - pOH = 14 - 0.89 = 13.11

sodium (na), for example, has one electron in its valence shell. this is an unstable state because that valence shell needs eight electrons to be full. in order to fill its valence shell, find a way to add seven electrons to its valence shell

c)red bank

explanation:

red bank is a borough in monmouth county, new jersey, incorporated in 1908 and located on the navesink river, the area's original transportation route to the ocean and other ports.