diff --git a/js/common/view/ABSScreenView.js b/js/common/view/ABSScreenView.js
index 5ed83eb0..0f877fa6 100644
--- a/js/common/view/ABSScreenView.js
+++ b/js/common/view/ABSScreenView.js
@@ -80,8 +80,13 @@ define( require => {
     } );
 
     this.viewProperties.toolModeProperty.link( function( toolMode ) {
+
       pHMeterNode.visible = ( toolMode === ToolMode.PH_METER );
-      pHPaperNode.visible = pHColorKeyNode.visible = ( toolMode === ToolMode.PH_PAPER );
+
+      const pHPaperVisible = ( toolMode === ToolMode.PH_PAPER );
+      pHPaperNode.visible = pHPaperVisible;
+      pHColorKeyNode.visible = pHPaperVisible;
+
       conductivityTesterNode.visible = ( toolMode === ToolMode.CONDUCTIVITY );
     } );
 
diff --git a/js/mysolution/MySolutionScreen.js b/js/mysolution/MySolutionScreen.js
index 29f5f710..45d749ba 100644
--- a/js/mysolution/MySolutionScreen.js
+++ b/js/mysolution/MySolutionScreen.js
@@ -65,7 +65,8 @@ define( require => {
     // position the molecules
     h3oNode.left = xSpace;
     ohNode.right = width - xSpace;
-    h3oNode.centerY = ohNode.centerY = height / 2;
+    h3oNode.centerY = height / 2;
+    ohNode.centerY = h3oNode.centerY;
 
     const background = new Rectangle( 0, 0, width, height, { fill: 'white' } );
 
diff --git a/js/mysolution/view/SolutionControl.js b/js/mysolution/view/SolutionControl.js
index 15fc20f7..2fc851c4 100644
--- a/js/mysolution/view/SolutionControl.js
+++ b/js/mysolution/view/SolutionControl.js
@@ -132,8 +132,15 @@ define( require => {
     const subtitleYSpacing = 6;
     const separatorYSpacing = 6;
     const controlYSpacing = 6;
+
     // controls are all center justified
-    acidBaseSwitch.centerX = concentrationValueControl.centerX = concentrationSlider.centerX = weakStrongSwitch.centerX = strengthSlider.centerX = separatorWidth / 2;
+    const centerX = separatorWidth / 2;
+    acidBaseSwitch.centerX = centerX;
+    concentrationValueControl.centerX = centerX;
+    concentrationSlider.centerX = centerX;
+    weakStrongSwitch.centerX = centerX;
+    strengthSlider.centerX = centerX;
+
     // subtitles are left justified
     concentrationSeparator.top = acidBaseSwitch.bottom + separatorYSpacing;
     concentrationTitle.top = concentrationSeparator.bottom + separatorYSpacing;