Salinity and pH

What is salinity? (do not include "the" in your answer)

What is salinity?

• total amount of dissolved salts in water

• addition of salts to pure water

• grams of salts per kilogram of water (parts per thousands)

• amount of halogens in water sample

What is the pH scale?

• A measure of acidity or alkalinity of a substance, ranging from 0 to 14

• A measure of temperature in Celsius

• A measure of time in seconds

• A measure of distance in kilometers

What disassociates completely into its ions when dissolved in water?

• weak base

• strong acid

• weak acid

• strong base

What is the effect of high salinity on the pH of seawater?

• A) Increases pH making it more alkaline

• B) Decreases pH making it more acidic

• C) No effect on pH

• D) Neutralizes the pH

Which instrument is commonly used to measure the pH of a solution?

• A) Thermometer

• B) pH meter

• C) Barometer

• D) Hygrometer

What is the typical pH range of ocean water?

• A) 1-3

• B) 5-6

• C) 7.5-8.4

• D) 9-10

Tags

NGSS.MS-PS1-2

How does salinity affect the density of seawater?

• A) Increases density

• B) Decreases density

• C) No effect on density

• D) Makes it less dense than freshwater

What is the primary source of salinity in the ocean?

• A) River runoff

• B) Volcanic eruptions

• C) Atmospheric deposition

• D) Evaporation of seawater

Which of the following is a strong acid that can affect pH levels in water?

• A) Hydrochloric acid (HCl)

• B) Acetic acid (CH3COOH)

• C) Citric acid (C6H8O7)

• D) Carbonic acid (H2CO3)

Tags

NGSS.HS-ESS2-5