fn control option command MODULE Science 7 in your notebook. GIASU: mulov solution that is 2% boric acid? amp smuloV noulo2 ml Jortoals Ivtis im OS enieinoo noloz nailatoe-to-guoauloV 2. What is the percent by volume of a 90mL solution that contains 25 mL fee to uln methanol? Jm 02 x Im 08 LET'S PRACTICE! PRACTICE 1: C1. Alcohol as disinfectant is normally sold as a solution of 70% ethyl or isopropyl alcohol. How much alcohol is present in a 100 mL solution? A. 30 mL B. 60 mL 2. A beverage contains 3% alcohol which means that, A. The solution contains 30 mL of alcohol. C. 70 mL D. 75 mL B. The solution contains 30 mL water in 70 mL of water. C. The solution contains 3 mL of alcohol in 97 mL of water. D. The solution contains 300 mL of alcohol in 700 mL of water.

A doctor has ordered for a week 0.35 grams of Carvedilol for a patient with high blood pressure. If your stock on hand consists of 25 mg tablets, how many tablets will you need for 1 day's treatment for the patient? QUESTION 13 O a. 2 O b. 14 O C. 7 O d. 20 O e. 1 QUESTION 14

If CaCl2 2H2O has a MW = 147. What is the concentration (g/mL) of a solution containing 4 mEq of CaCl2 2H2O per milliliter? O a. 0.294 g/mL O b. 0.986 g/mL O c. 0.389 g/mL O d. 0.345 g/mL O e. 0.545 g/mL

Biological studies have found that aqueous solutions containing as little as 28 µg of allicin per milliliter inhibit bacterial growth. Express this amount as the number of moles of allicin per liter of solution. \(28~\text{ug/mL}=\) \(text{mol/L}\) 20 F3 II F8 F4 F5 F6 F7 F9 F10 F11 F12 & %24 4. 3 5 7 9 { } P E T Y U %3D * CO R %23

If you want to make 50mL of a 15% glucose solution, how many grams of glucose do you need to weigh out?

O STOICHIOMETRY Using molarity to find solute mass and solution volume updates now or try tonight? Jada Calculate the volume in milliliters of a 0.30 mol/L barium chloride solution that contains 25.0 g of barium chloride (BaCl,). Round your answer to 2 significant digits. 1.36 PM Explanation Check Terms of Use Privacy Accessibity 2021 McGraw-Hill Education. All Rights Reserved & delete 2# $ 8 9 7 2 3 4 1 T Y U R W II

scaling up Solutions Sometimes we know the concentration of a solute but we need to make a larger volume of the solution. Example: An IV saline solution is based on 0.9% NaCI = 0.9g/100mL (dL). To make 1L of the same concentration (0.9%), how many grams of NaCl would we need? Hint: first convert mL or dL to L. Next, to get from our original volume of 0.1 L to our desired volume of 1L, we need to multiply by a factor of 10. If we want to keep the concentration of this solution the same (0.9%) we will also need to multiply the amount of solute by the same factor of 10. Molar Ratios and Chemical Equations The concept of the mole is useful in chemical reactions. Molecules react in molar ratios which are expressed in equations. Neutralization of an Acid Example: HCI + NaOH → NaCI + H2O This equation says that 1 mole of acid is neutralized by 1 mole of base to produce 1 mole of salt and 1 mole of water. Since a mole is the MW in grams, then you can calculate how much base you need to to…